2 syllables:
attar, atter, at her, at tur, batter, blatter, catar, catarrh, chatter, chattr, clatter, datar, fatter, flatter, gatter, gratter, hatter, latar, latter, matter, natter, patar, patter, phatter, platter, ratter, sater, sattar, satter, scatter, schlatter, shatter, slatter, smatter, spatter, splatter, tatar, tatter, that her, tratar, vatter, xatar, yatter, zatar, autor, autre, battre, blotter, botar, botter, boughter, bought her, brought her, caught her, cauter, clotter, cotter, datter, daughter, dotter, flaughter, flawter, flotar, flotter, frotter, gotter, got her, hotter, jotter, katar, knotter, kotter, lawter, lotter, mahtar, motter, newater, notter, not her, otter, plotter, potter, quatar, quater, rotter, sautter, schlotter, shot her, slaughter, slotter, snotter, sought her, spotter, spotter', squatter, stotter, straughter, swatter, swotter, taught her, thought her, totter, trotter, vawter, water, watter, yachter, zotter, -ator, aitor, ater, baiter, bater, cater, clater, claytor, crater, cratere, dater, dator, eighter, flater, frater, freighter, gaiter, gater, gator, gaytre, grater, greater, hater, hate her, hayter, kater, krater, kreator, later, maatr, maatre, matre, nater, pater, patre, plaiter, plater, prater, praytor, quatre, rater, sator, satre, schlater, skater, slater, slayter, sleator, stater, stator, straighter, strater, tater, tator, traiter, traitor, trator, vater, vator, waiter, waitr, yater

3 syllables:
aplatir, backscatter, back matter, beflatter, bescatter, bespatter, combater, combatir, combattre, end matter, formatter, front matter, gray matter, grey matter, hamfatter, impastor, madhatter, mcfatter, mcphatter, no matter, outflatter, puff batter, standpatter, the matter, toscatter, vanatter, vannater, vannatter, waste matter, white matter, wildcatter, agotar, allotir, allotter, anotar, azotar, back-water, backwater, bathwater, bath water, bayswater, bilge-water, bilgewater, blackwater, blendwater, blue-water, bluewater, bogtrotter, bowater, boycotter, branch water, breakwater, break water, bridgewater, bridgwater, brightwater, broadwater, bywater, catchwater, clearwater, cold-water, coldwater, complotter, cutwater, deep-water, deepwater, dishwater, ditchwater, drinkwater, edgewater, eyewater, fairwater, feedwater, firewater, first water, fitswater, fitzwater, flatwater, floodwater, fly-swatter, flyswatter, forgot her, formater, fresh-water, freshwater, fresh water, globe-trotter, goddaughter, goldwater, goodwater, grand-daughter, grandaughter, granddaughter, graywater, greywater, groundwater, ground water, hard water, headwater, heartwater, high-water, highwater, high water, hot-water, ice water, jerkwater, lime-water, limewater, low water, make water, manslaughter, mccotter, meltwater, mid-water, milkwater, pass water, pinkwater, pinquater, pinspotter, piotter, pomewater, pomwater, porewater, rainwater, redwater, red water, rose-water, rosewater, rose water, rough water, salt-water, saltwater, sandlotter, seawater, sea otter, self-slaughter, shearwater, sheerwater, shotspotter, sidewater, slack water, smartwater, soft water, southwater, springwater, spring water, spurn-water, step-daughter, stepdaughter, stillwater, stormwater, strong-water, sweetwater, tail-water, tailwater, take water, tap water, tarwater, teeswater, thelotter, tidewater, trainspotter, trendspotter, ullswater, wastewater, wastwater, well water, white-water, whitewater, white water, wirewater, abater, abator, abatur, ablator, acater, affreighter, allaiter, archtraitor, await her, ballater, barrater, bay stater, bellator, castrater, castrator, citator, collator, constater, creator, curator, debater, debatir, debator, decatur, deflater, deflator, dictator, diktator, dilater, dilator, donator, downstater, dumb-waiter, dumbwaiter, embratur, epater, equater, equator, fellator, first-rater, fixator, forfaiter, frustrater, glossator, grallator, gyrator, headwaiter, head waiter, hostgator, hydrator, ice-skater, inflater, inflator, jew-baiter, landwaiter, lemaitre, levator, ligator, linklater, locater, locator, mandator, mercator, migrator, misater, mutator, narrater, necator, negator, nitrator, notator, novator, pdfcreator, piscator, pond-skater, potator, probator, pronator, prostrator, pulsator, punctator, racetraitor, rapator, rebater, regrater, regrator, relater, relator, rotator, saltator, sea slater, serrator, shad-waiter, sopater, speedskater, tailgater, testator, third-rater, titrator, translater, translator, tronator, updater, upstater, vacatur, vanmatre, viator, wine waiter, zoolater

4 syllables:
antimatter, black lives matter, chitterchatter, fecal matter, fritter batter, loviatar, mongol tatar, overmatter, pancake batter, pitter-patter, spin the platter, state of matter, subject matter, troposcatter, turko-tatar, written matter, annunciator, barley-water, barley water, chlorine water, cologne water, cybersquatter, derwentwater, distilled water, drinking water, f.i.r., fallingwater, foster-daughter, gastrolater, gillenwater, great-granddaughter, h.e.r., heavy water, holy water, imprimatur, j.a.r., lily-trotter, making water, milk-and-water, mother's daughter, o.a.r., overwater, passing water, phycomater, police blotter, polywater, quinine water, river otter, sewer water, soda-water, soda water, sparkling water, sugar water, surfeit-water, take in water, teeter-totter, teetertotter, tetter-totter, titter-totter, toilet water, tonic water, treading water, underwater, vichy water, ziment-water, abdicator, abnegator, abrogator, activator, actuator, adminstrator, adulator, advocator, agadmator, aggravator, agistator, agitator, akinator, aligator, allegator, alligator, allocator, allocatur, alternator, ambulator, amputator, animator, annotator, applicator, approbator, arbitrator, arborator, archiater, arendator, arpentator, arrogator, aspirator, astrogator, astrolater, auktionator, auscultator, aviator, baconator, bardolater, bloviator, brusselator, buccinator, cachinnator, calculator, calibrater, calibrator, captivator, carbonator, carburator, carburetor, castigator, celebrater, celebrator, chicxulub crater, chlorinator, cinerator, circulator, cogitator, combinator, commendator, commentator, commutator, companator, compensator, compilator, compotator, compurgator, concentrator, conciator, confiscator, congregator, congress gaiter, conjugator, conjurator, consecrater, consecrator, consolator, consummator, contemplator, convocator, corporator, correlator, corrugator, criminator, cultivator, cybernator, decimator, declamator, decollator, decorator, dedicator, defalcator, defecator, delegator, demarcator, demonstrater, demonstrator, denigrator, dephlegmator, deprecator, depredator, deputator, desecrater, desecrator, designator, desolator, detonator, devastator, deviator, dilatator, dissertator, dissipater, dissipator, divinator, dominator, duplicator, educator, elevator, emanator, emendator, emigrator, emulator, epilator, escalator, escheator, estimator, evocator, excavator, excitator, expiator, expilator, explicator, exsiccator, extirpator, fabricator, fabulator, fascinator, figure-skater, flagellator, formulator, fornicator, fractionator, fulminator, fumigator, generator, germinator, gladiator, gonkulator, governator, graduator, granulator, gurgitator, habitator, hesitater, hesitator, hibernator, idolater, idolator, illustrator, imitater, imitator, immolator, imprecator, impregnator, incarnator, incubator, inculcator, indagator, indicator, infiltrator, inhalator, innovator, inspirator, inspissator, instigator, instillator, instilllator, insufflator, insulator, integrator, intubator, inundator, irrigator, irritator, isolator, iterator, jaculator, jetavator, joculator, judicator, jugulator, kegerator, kelvinator, lachrymator, lacrimator, laminator, lapidator, legislator, levitator, liquidator, literator, litigator, lubricator, lunar crater, macerator, machinator, malaxator, masticater, masticator, masturbator, mediator, medicator, meditator, meliorater, meliorator, metadate er, methylator, mitigator, moderator, modulator, monolater, motograter, mutilator, mystificator, navigator, nomenclator, nominator, nucleator, numerator, obfuscator, objurgator, obligator, obturator, obviator, operator, orchestrator, ordinator, oscillator, osculator, ostentator, out-of-stater, oxidator, ozonator, peculator, penetrator, percolator, perforator, permeator, permulator, perpetrator, personator, perturbator, phabricator, pollinator, populator, postillator, postulator, predicator, procreator, promulgator, propagator, protestator, punctuator, rabiator, radiator, rectificator, regulator, remonstrator, renovator, replicator, resonator, respirator, revelator, roller-skater, rotavator, rotovator, rubricator, ruminator, rusticator, salivator, saturater, saturator, scintillator, second-rater, segregator, selling-plater, separator, seperator, sequenator, sequestrator, simulator, sosipater, speculator, spoliator, stabilator, stellarator, stimulater, stimulator, stipulator, stridulator, subjugator, suffragator, sulphurator, summercater, superfreighter, supinator, supplicator, syncopator, syndicator, tabulator, telestrator, telustrator, terminator, testificator, titillater, titillator, tolerator, trafficator, transformator, travelator, travolator, triturator, twerkulator, undulator, urinator, vacillator, valuator, venerator, ventilator, ventilatore, verilator, vindicator, violator, water skater, wheelabrator, whizzinator, woman-hater, woman hater, wurstelprater

5 syllables:
crux of the matter, textual matter, ammonia water, body of water, bourton-on-the-water, cynthia potter, danny drinkwater, eurasian otter, mineral water, sibanye-stillwater, the shape of water, 28 days later, 28 weeks later, abbreviator, aberuncator, abominator, accelerator, accommodator, accumulator, achillobator, adjudicator, administrator, adulterator, agglomerator, alienator, alleviator, alliterator, amalgamator, ameliorator, amphitheater, amphitheatre, annihilator, anticipator, appreciator, appropriator, approximator, arcovenator, arpeggiator, articulator, asphyxiator, assassinator, asseverator, assimilator, associator, attenuator, authenticator, averruncator, bibliolater, bronchodilator, calorisator, calumniator, capitulator, centuriator, christophe lemaitre, co-operator, co-ordinator, coagulator, cogenerator, collaborator, commemorator, commiserator, communicator, concavenator, conciliator, confabulator, confederator, conglomerator, congratulator, considerator, consolidator, contaminator, continuator, cooperator, coordinator, corroborator, deactivator, decapitator, decelerator, decorticator, defibrillator, defoliator, degerminator, deliberator, delineator, demodulator, demonolater, denominator, denunciator, depopulator, depreciator, desalinator, determinator, dilapidator, discriminator, disintegrator, disseminator, dissimulator, domesticator, dracovenator, edulcorator, ejaculator, elaborator, electroplater, eliminator, elucidator, elutriator, emancipator, emasculator, encapsulator, enucleator, enumerator, enunciator, epitomator, equivocator, eradicator, evacuator, evaluator, evaporator, eviscerator, exaggerator, examinator, exasperater, excelerator, excogitator, excoriator, exhilarator, exonerator, expatiator, expostulator, expropriator, extenuator, exterminator, extrapolator, facilitator, falsificator, felicitator, flight indicator, flight simulator, flux applicator, food elevator, freight elevator, full radiator, gesticulator, growth regulator, habilitator, hagiolater, hand calculator, house decorator, humiliator, hypothecator, iconolater, illuminator, imperobator, impropriator, improvisator, inaugurator, incarcerator, incinerator, incorporator, incriminator, indoctrinator, inoculator, inseminator, insidiator, interpellator, interpolator, interrogator, intimidator, invalidator, investigator, invigilator, invigorator, irradiator, justificator, legitimator, manipulator, modificator, monochromator, multiplicator, nash-kelvinator, negotiator, neverthelater, obliterator, officiator, opiniator, opinionator, optoisolator, originator, oxygenator, pacificator, perambulator, peregrinator, perpetuator, pontificater, pontificator, potentiator, precipitator, predestinator, predominator, prefabricator, premeditator, procrastinator, prognosticater, prognosticator, proliferator, pronunciator, pulse generator, purificator, qualificator, quartz oscillator, re-animator, reanimator, reciprocator, recriminator, recuperater, recuperator, redecorator, redintegrator, refridgerator, refrigerator, regenerator, regurgitator, rejuvenator, remunerator, repudiator, resuscitator, retaliator, reverberator, room decorator, sacrificator, sales demonstrator, scarificator, sermocinator, significator, somnambulator, sooner or later, sophisticator, speed indicator, stabilisator, subordinator, the great dictator, totalisator, totalizator, transliterator, turn indicator, vasodilator, vaticinator, versificator, vinificator, vituperator, wind generator

6 syllables:
pictorial matter, blow out of the water, carbonated water, come hell or high water, lady in the water, aerogenerator, astronavigator, bioindicator, celestial equator, chinese alligator, circumnavigator, counterdemonstrator, crystal oscillator, darvaza gas crater, decontaminator, denitrificator, differentiator, dineobellator, disambiguator, disarticulator, engine-generator, excommunicator, experimentator, fuel indicator, genus alligator, ichthyovenator, individuator, intermediator, laplace operator, leading indicator, local oscillator, magnetic equator, nanogenerator, neuromodulator, neurostimulator, newsstand operator, noncooperator, opensimulator, opto-isolator, osmoregulator, owner-operator, paraeducator, pocket calculator, poweranimator, pump-oxygenator, ratiocinator, recapitulator, reinvigorator, service elevator, switchboard operator, teleoperator, thermoregulator, transilluminator, transubstantiator, turbogenerator, voltage regulator, yandere simulator

7 syllables:
conservation of matter, places in harry potter, territorial water, common denominator, company operator, google authenticator, hyperaccumulator, immunomodulator, linear operator, micromanipulator, nitrovasodilator, oxygen concentrator, photocoagulator, private investigator, proton accelerator, rotary actuator, telegraph operator, telemanipulator, telephone operator, turboencabulator

8 syllables:
a.n.s.w.e.r., s.t.a.l.k.e.r., american alligator, electric refrigerator, electron accelerator, elevator operator, heterodyne oscillator, identity operator, immunopotentiator, induction accelerator, interior decorator, linear accelerator, microsoft flight simulator, particle accelerator, principal investigator, random number generator

9 syllables:
law of conservation of matter, academic administrator, electrostatic generator, modulator-demodulator, thermoelectric generator

10 syllables:
tissue plasminogen activator

11 syllables:
microwave linear accelerator

2 syllables:
cracker, taker, smacker, stocker, bagger, wrapper, fakir, wader, ocher, acre, locker, packer, taper, cager, caper, jogger, maigre, swagger, slacker, shopper, flapper, solder, plodder, fodder, jabber, whacker, neighbor, labor, trader, backer, clapper, cropper, laugher, cocker, cobber, agar, shaper, dapper, whopper, robber, stopper, tapir, crapper, slogger, caber, nagger, jobber, jagger, breaker, nacre, grader, faker, choker, hacker, raider, radar, tracker, tabor, sabre, labour, tabour, stagger, dodder, nadir, slobber, knacker, madder, copper, rocker, blocker, raper, blabber, seder, clobber, lager, draper, decor, bobber, dagger, sapper, adder, bladder, proper, topper, maker, shocker, clabber, vapor, grabber, stabber, neighbour, lacquer, daycare, paper, rapper, logger, dropper, ladder, baker, hopper, scrapper, docker, soccer, jaeger, mapper, knocker, scraper, snapper, strapper, quaker, trapper, slabber, mocker, chopper, saber, shaker, laager, bader, bakker, faqir, pabir, satyr, nader

3 syllables:
macabre, wax paper, test paper, improper, attacker, crepe paper, puff adder, fish ladder, rope ladder, punk rocker, rice paper, art paper, bean caper, swim bladder, graph paper, invader, red snapper, parader, white paper, laid paper, abrader, blood agar, god's acre, air bladder, playgoer, crusader, belabor, free trader, on paper, bond paper, death adder, wove paper, kraft paper, camp robber, doorstopper, eye dropper, footslogger, hard solder, minotaur, plant hopper, rock hopper, sand hopper, sea robber, sinoper, soft-solder, soft solder, stockjobber, valve rocker, cat cracker, dust wrapper, gray snapper, hog snapper, jack ladder, line backer, milk adder, sea ladder, step ladder, thigh-slapper, white madder, wild madder, beer maker, belabour, belt maker, boot maker, bread maker, car maker, film maker, forrader, ground-shaker, horse trader, ice maker, in labor, lens maker, map maker, partaker, persuader, pledge taker, poll taker, rag paper, risk taker, salt shaker, score paper, slave trader, stock trader, stone breaker, tar paper, tea maker, thread maker, wine maker, zeus faber

4 syllables:
oyster cracker, carbon paper, order paper, filter paper, writing paper, double dagger, basket maker, scaling ladder, blister copper, ledger paper, coffee maker, beta blocker, soda cracker, jacob's ladder, conquistador, wrapping paper, water vapor, circuit breaker, cartridge paper, toilet paper, graham cracker, cannon fodder, spanish dagger, tracing paper, tissue paper, litmus paper, belly whopper, boston rocker, graverobber, jewels-of-opar, pettifogger, platform rocker, silver solder, storage locker, banded adder, cannon cracker, checkered adder, cloak-and-dagger, flaccid bladder, mangrove snapper, monkey ladder, mutton snapper, pilot ladder, spirit rapper, whippersnapper, agar-agar, air search radar, auto maker, ballad maker, barrel maker, blueprint paper, butcher paper, census taker, cocktail shaker, common caper, devil-may-care, draft evader, drawing paper, hell's half acre, image breaker, letter paper, linendraper, linen paper, movie maker, music paper, naval radar, pad of paper, peppershaker, piece of paper, profit taker, rolling paper, roofing paper, sedum acre, sheet of paper, slip of paper, statue maker, ticket taker, transfer paper, trouble maker, weather radar

5 syllables:
india paper, manila paper, cigarette paper, extension ladder, aerial ladder, commercial paper, construction paper, calcium blocker, histamine blocker, indian madder, computer paper, decision maker, emery paper, espresso maker, jewelry maker, manilla paper, manual labor, manual labour, microwave radar, nutrient agar, opium taker, policy maker, surface search radar, typewriter paper

6 syllables:
davy jones's locker, department of labor, catalytic cracker, urinary bladder, american copper, alligator snapper, northern jacob's ladder, early warning radar, fire control radar, historical paper, photographic paper, syrian bean caper

7 syllables:
accommodation ladder, secretary of labor

9 syllables:
department of commerce and labor

10 syllables:
secretary of commerce and labor