1 syllable:
-clase, ace, aisse, baisse, base, bass, brace, caisse, cayce, chace, chase, crace, dace, drace, dspace, dtrace, face, frace, glace, grace, graisse, heyse, lace, mace, mais, nace, nspace, pace, phace, place, pspace, ptrace, race, rais, space, stace, stase, strace, tayce, trace, vase, wace, xbase, {brace

2 syllables:
abase, airbase, airspace, air base, altace, ambase, amesace, anelace, apace, arms race, arspace, backspace, backtrace, back brace, belace, best-case, biface, big-face, birthplace, bitbrace, blackface, black race, blank space, blueface, boat-race, boat race, boldface, bongrace, bookcase, bowgrace, braceface, braincase, briefcase, broad-base, broadbase, bucase, by-place, c-base, capcase, carcase, cardcase, car race, catface, chaincase, chalkface, cheeseface, chessbase, clayface, clearcase, clock face, clubface, coalface, codebase, coface, coinbase, couchbase, crankcase, crawlspace, crunchbase, cubase, cytase, czarface, darktrace, dbase, debase, deepface, deep space, deface, degrace, deltase, disbase, discase, disc space, disgrace, disk space, dispace, displace, display ps, dogface, dollface, doorcase, doughface, dreamspace, drivespace, e-base, efface, ekstase, embase, embrace, emplace, encase, enchase, enface, enrace, erase, espace, essbase, estrace, euclase, extase, false face, fanbase, fangface, farm-place, farmplace, findface, first base, fishbase, fly-case, footrace, foot race, forebrace, foreface, foxbase, frank-chase, free-base, freebase, fuckface, full-face, gameface, gearspace, greyface, half-space, hardcase, headcase, headspace, homebase, homeplace, horse-race, horse race, i-case, imbase, incase, inchase, ingrace, inlace, in place, itase, keybase, knee brace, koobface, laccase, lactase, laface, lambastes, landrace, landspace, laplace, last-place, lee pace, left-brace, lightface, livspace, lootcase, lovelace, mainbrace, maltase, meatspace, misplace, mixed-race, moonbase, moonface, myspace, n-space, namespace, neck brace, newspace, nodejs, non-place, noplace, null-space, nullspace, null space, nutcase, off-base, onespace, on base, outface, outpace, outplace, outrace, parcase, parcplace, pecase, pectase, percase, petase, phytase, pigface, point lace, postface, pramface, proface, rackspace, rapace, rat race, re-trace, rebase, rebrace, rechase, reed mace, relace, replace, rerebrace, retrace, right-brace, rimbase, rockface, sack race, saygrace, scapegrace, scarface, scratch race, seedcase, shoelace, shoe lace, showcase, showplace, skiptrace, ski race, skull-face, slapeface, slipcase, smallcase, smearcase, snapcase, snot-face, someplace, squarespace, staircase, stake race, starbase, steelcase, stone-face, straight face, streptase, sub-base, subbase, subspace, suitcase, sunspace, supplace, surbase, swap space, sybase, take place, talkspace, tax base, third base, thrombase, toolcase, torch race, touch base, transplace, trollface, tryptase, two-face, typecase, typeface, unbrace, uncase, unface, unlace, uptrace, vambrace, vantbrace, volte-face, warface, watchcase, webspace, wheelbase, whey-face, wheyface, white-face, whiteface, whitespace, white race, will & grace, woodface, workplace, workspace, worst-case, wry face, yacht race, {left-brace, }close-brace, }right-brace

3 syllables:
about-face, aboutface, acid-base, aerospace, aftertastes, anatase, ankle brace, annagrace, anyplace, arcaspace, army base, arobase, arrobase, aspartase, at that place, baby-face, babyface, basketcase, battlespace, blurryface, bobbin lace, boniface, bouillabaise, bouillabaisse, brazenface, breathing place, breathing space, brussels lace, camelcase, case-by-case, cityplace, claiming race, clean-in-place, clinoclase, commonplace, convertase, counterbrace, country-base, coup de grace, createspace, cyberchase, cyberspace, database, david chase, demi-glace, demiglace, diabase, diastase, dioptase, dnase, double-face, double-space, dwelling-place, dynatrace, eating place, ecospace, eigenface, eigenspace, elastase, enclosed space, enterlace, evergrace, everspace, everyplace, face-to-face, final space, firebase, fireplace, foam-in-place, gopherspace, gynobase, hackerspace, hammerspace, harness race, hatchet-face, herb-of-grace, herb of grace, hiding place, hilbert space, holy place, human face, human race, hurdle race, hydratase, hydro-base, hydrospace, hyperbase, hyperspace, in-your-face, innerspace, instabase, interbase, interface, interlace, interplace, interspace, invertase, isobase, jadagrace, jonbenet's, kilobase, kissy-face, knowledgebase, knowledge base, landing place, leatherface, leslie grace, letterspace, liquibase, lithoclase, living space, lower-case, lowercase, lurking place, maggie grace, market-place, marketplace, meeting place, megabase, metric space, monospace, nancy mace, navy base, needlecase, negroid race, nesting place, notecase, open-face, orthoclase, outer space, out of place, overgrace, paleface, panabase, paperchase, paper chase, parking space, periclase, phosphatase, pillow-case, pillowcase, pillow lace, planetbase, poker face, polling place, polyspace, pudding-face, puddingface, quarterpace, queen anne's lace, rain-in-the-face, reductase, reed-mace, reembrace, relay race, rheobase, rocket base, roman pace, royal brace, sailing-race, sclerobase, second base, secretase, selling race, senate race, single-space, skiing race, slavic race, solvespace, state of grace, stay in place, steeplechase, stoneface, stone life face, storage space, sulfatase, sulphatase, superbase, superspace, swinecase, synaptase, syntax-case, synthetase, tablespace, tallow-face, taserface, the good place, the staircase, thorough-brace, three days grace, transcriptase, translocase, triple-space, underbrace, uniface, upper-case, uppercase, uricase, usace, whatshisface, xpercase, year of grace, yellowface, yellow race, zero-base, {open-brace

4 syllables:
aconitase, agent-in-place, anorthoclase, arianespace, aromatase, as-interface, a quiet place, bicycle race, caucasian race, chariot race, cyberespace, dehydratase, electrospace, fall into place, gathering place, google workspace, governor's race, graph database, indian race, in the first place, isomaltase, mckenna grace, memory trace, mongoloid race, moving staircase, noomi rapace, nucleobase, obstacle race, oligoclase, operabase, pegloticase, plagioclase, polymerase, potato race, prisoner's base, rasburicase, reiterates, rupaul's drag race, streptokinase, triphosphatase, visual space, watering place

5 syllables:
at a lower place, automobile race, c3-convertase, dihydroorotase, ferrochelatase, freelance marketplace, geometric pace, interstellar space, in a higher place, military pace, mongolian race, open fireplace, pyrophosphatase, to a higher place, to a lower place, user interface

6 syllables:
amerindian race, command-line interface, command line interface, computer database, four-dimensional space, fructose-bisphosphatase, garth marenghi's darkplace, imaginary place, lexical database, oxidoreductase, parallel interface, thefutureembrace

7 syllables:
3000 metres steeplechase, electronic database, histidinol-phosphatase, interplanetary space, relational database, wizards of waverly place

8 syllables:
graphical user interface, guantanamo bay naval base, unified payments interface

9 syllables:
small computer system interface

12 syllables:
musical instrument digital interface

1 syllable:
rates, skates, bates, gates, plates, states, waits, fates, straits, dates, weights, mates, eights, greats, hates, state's, states', traits, yeats

2 syllables:
awaits, cordaites, creates, debates, dictates, dire straits, gulf states, kuwait's, misstates, naucrates, relates, the fates, translates, updates

3 syllables:
desperate straits, hydrobates, hylobates

4 syllables:
united states, system of weights

5 syllables:
william butler yeats, war between the states

9 syllables:
commonwealth of independent states, capital of the united states, president of the united states

10 syllables:
constitution of the united states

11 syllables:
organization of american states

12 syllables:
attorney general of the united states