1 syllable:
-crat, -stat, at, bat, batt, batte, bhatt, blatt, blatte, brat, bratt, cat, catt, catte, cemat, chat, chatte, dat, dth vsat, fat, flat, flatt, fltsat, gat, gatt, glatt, gnat, gnatt, hat, hatt, hatte, hnat, jagt, jatte, kat, katt, klatt, krat, kratt, lstat, ma'at, mat, matt, matte, nat, natte, njrat, pat, patt, patte, platt, platte, pratt, pratte, ratte, rstat, sat, satte, scat, scatt, schadt, schmatte, scrat, shatt, shmatte, skatt, slaght, slat, slatt, spat, splat, splatt, sprat, spratt, stat, statt, strat, tat, that, tratt, tschat, vat, vrchat

2 syllables:
a-flat, airbat, al-lat, and that, annat, arhat, arnatt, assat, at-bat, b-flat, backchat, bad hat, basel-stadt, bath mat, bearcat, bear cat, beermat, begat, ben platt, biernat, bierstadt, bigfat, big cat, black cat, blue cat, bobcat, bogmat, bone fat, borat, bougnat, brass hat, brickbat, brown bat, bullbat, but that, buy at, cadpat, call at, carlstadt, castrat, cave bat, cavtat, cepat, cerat, cerat-, chauchat, chip at, chit-chat, chitchat, choueifat, chris pratt, chromat, citat, clam-flat, climat, cluebat, cocked hat, combat, combate, commat, comrat, comstat, comtat, coon cat, cowpat, cuecat, d'etat, darmstadt, debatte, decat, defat, delatte, deslatte, diktat, dingbat, displat, does that, domat, doormat, dorpat, down pat, dress hat, ducat, dutchbat, eat at, eclat, eilat, ekkathat, elat, empat, erftstadt, esbat, estat, ex-pat, exfat, expat, explat, fall flat, farhat, fat-cat, fatcat, felt hat, femstat, festplatte, fittrat, floormat, format, forstat, freemat, fruitbat, fruit bat, fur hat, gall gnat, get at, gnaw at, gujrat, hacat, haemat, hallstadt, hard hat, hashcat, hauptstadt, hazmat, heirat, hell-cat, hellcat, hepat, hepat-, hepcat, hereat, hesat, hexchat, high hat, hikmat, hipchat, housecat, house cat, hurlbat, iccat, ichat, impatt, incat, insat, instat, intat, in that, is that, jest at, jorhat, karjat, karlstadt, karstadt, keelfat, khilat, kismat, kit-cat, kit-kat, kitcat, korat, kurdsat, labatt, landsat, langsat, laugh at, leaf fat, legat, lestat, limbat, lippstadt, lokmat, lolcat, look at, low-fat, man-bat, mancat, manx cat, marpat, matpat, mcnatt, mentat, mercat, milkfat, mofat, mole-rat, moonbat, motat, mudcat, mudflat, mud flat, mule fat, musk-rat, muskrat, nadsat, navsat, netcat, nilstat, non-fat, nonfat, nopat, noplat, north platte, numbat, of that, on that, optat, orbat, pack-rat, packrat, palm cat, peck at, pick at, pith hat, pitpat, placemat, place mat, play at, pluck at, plug hat, pneumat, pneumat-, poke at, polecat, popat, porat, prayer mat, prevatt, prevatte, prostat-, pull at, qismat, quail at, rat-tat, redcat, redhat, red bat, reichsrat, ronstadt, rugrat, run-flat, sabbat, sadat, sairat, saltcat, sam & cat, sand cat, sarratt, sarsat, schallplatte, seacat, sea mat, sebat, sehcat, shine at, shop at, shtrafbat, sifat, sigcat, silat, silk hat, slouch hat, smartcat, snapchat, snap at, sno-cat, snowcat, socat, somat, south platte, specat, sphynx cat, standpat, stand pat, starsat, stay at, stonecat, straw hat, stripchat, such that, susat, tapat, therat, thereat, tib-cat, tin hat, tipcat, tomat, tomcat, topcat, top hat, torchat, to that, traumat, true cat, tvsat, uncat, unhat, unplat, urstadt, verrat, wall-plat, weechat, werecat, wesat, whereat, whirlbat, wild-cat, wildcat, wing flat, wink at, with that, wombat, wood-rat, woodchat, wool fat, work at, worldcat, youcat, zermatt

3 syllables:
abitat, achromat, acrobat, acupat, adigrat, aegrotat, aerobat, aerostat, akkurat, akrobat, alley-cat, alleycat, alley cat, ameretat, amphicat, andermatt, antifat, aparat, apitpat, apparat, ariat, aromat, arrive at, asiat, assignat, aufsichtsrat, autocrat, autokrat, automat, autostadt, autostat, aviat, a look at, baby-sat, babysat, ballarat, balyeat, bancomat, bankomat, barostat, baseball bat, batibat, become flat, bellingcat, bell the cat, bengal cat, big brown bat, bishop's hat, bowler hat, bridle at, bristle at, bundesrat, bureaucrat, burmese cat, butterfat, camostat, campaign hat, caveat, channel cat, chemostat, chow yun-fat, civet cat, clarostat, clinostat, cocomat, compumat, concinnate, connive at, copycat, cosmocrat, coup d'etat, cowboy hat, cricket bat, cryostat, cryptocat, dabble at, democrat, demokrat, despotat, dichromat, diplomat, dixiecrat, doja cat, dolcelatte, durrenmatt, eberstadt, eizenstat, en-mishpat, entheat, ergostat, estedat, ethercat, excel at, fantomcat, filderstadt, firebrat, fisher cat, flying cat, fort-la-latte, fotomat, fraidy-cat, frankenstrat, frosted bat, fungistat, fungus gnat, gfycat, gib-cat, gornergrat, guano bat, guerguerat, gujarat, gujerat, gyrostat, habitat, haemostat, he's all that, hemostat, hesse-darmstadt, himavat, hognose bat, horseshoe bat, howeitat, hydrostat, hygrostat, hyperstat, ingolstadt, inmarsat, inverlat, iostat, jackass bat, josaphat, jungle cat, kattegat, kattegatt, ketupat, khubsoorat, kitty-cat, klinostat, kolovrat, kompromat, kurzgesagt, large-format, latitat, laundromat, leopard cat, leopoldstadt, looking at, maltese cat, marrowfat, marten cat, mastiff bat, meercat, megabat, microbat, miner's cat, minorat, mobocrat, monistat, monocrat, monsarrat, monstercat, montferrat, native cat, new world chat, nikkormat, nitrostat, noncombat, ochlocrat, ocicat, old world chat, opera hat, orange bat, orlistat, orthostat, pallas's cat, pallid bat, panamsat, pancreat, pancreat-, panipat, panther cat, parmalat, persian cat, photostat, picture hat, pit-a-pat, pitapat, pitty-pat, plutocrat, pulicat, pussycat, pyrostat, railroad flat, rampurhat, rat-a-tat, rat-tat-tat, reformat, reostat, rheocrat, rosenblatt, safety hat, scaredy-cat, semarnat, semimat, semimatte, shaktipat, she's all that, shovel hat, slavocrat, splintercat, spotted bat, superflat, superstrat, suricat, tabby cat, tablemat, table mat, technocrat, thefatrat, theocrat, thermostat, thundercat, tiger cat, tinychat, tit-for-tat, tittlebat, tit for tat, trichromat, under that, unimat, valued at, vampire bat, vanderjagt, velostat, verhofstadt, water mat, welcome mat, westerplatte, what does that, wikistrat, windirstat, winefat, woman's hat, wrestling mat, wurstsalat, yediyat, ziarat, ziggurat, zikkurat, zikurat

4 syllables:
al-adiyat, amadavat, and just like that..., angora cat, animal fat, apochromat, apostolat, aristocrat, aristokrat, avadavat, blepharostat, blue channel cat, buffalo gnat, calico cat, cavalier hat, cephalostat, chip away at, cobicistat, coelostat, data format, domestic cat, edible fat, egyptian cat, false vampire bat, febuxostat, gamarjobat, gerontocrat, hierogrammat, humidistat, intercombat, jehosaphat, judeo-tat, junooniyat, little brown bat, mabalacat, magnificat, masterformat, meritocrat, mexican hat, microformat, monochromat, mortal combat, oliver platt, physiocrat, pocketed bat, potentiostat, priya bapat, raaz-e-ulfat, rat-a-tat-tat, reichskonkordat, roxadustat, serhetabat, shammuramat, siamese cat, supayalat, thalassocrat, tortoiseshell-cat, true vampire bat, vagharshapat, vorinostat

5 syllables:
bacteriostat, carnivorous bat, casey neistat, catheterostat, commissariat, grumman f6f hellcat, ilta-sanomat, madagascar cat, male aristocrat, microhabitat, mutessarifat, orange horseshoe bat, panobinostat, schwarzburg-rudolstadt, wechselapparat

6 syllables:
alexandre desplat, autoexec.bat, dilraba dilmurat, european brown bat, european wildcat, female aristocrat, grumman f-14 tomcat, reichskommissariat

7 syllables:
palaeologus-montferrat

8 syllables:
landkreuzer p. 1000 ratte