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, 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, rat, 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, basel-stadt, bath mat, bearcat, bear cat, beermat, begat, ben platt, biernat, bierstadt, bigfat, big cat, black cat, black rat, blue cat, bobcat, bogmat, bone fat, borat, bougnat, brickbat, brown bat, brown rat, 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, 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, ducat, dutchbat, eat at, eclat, eilat, ekkathat, elat, empat, erftstadt, esbat, estat, ex-pat, exfat, expat, explat, fall flat, farhat, fat-cat, fatcat, femstat, festplatte, fittrat, floormat, format, forstat, freemat, fruitbat, fruit bat, gall gnat, get at, gnaw at, gujrat, hacat, haemat, hallstadt, hashcat, hauptstadt, hazmat, heirat, hell-cat, hellcat, hepat, hepat-, hepcat, hereat, hesat, hexchat, 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, 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, pack rat, palm cat, peck at, pick at, pitpat, placemat, place mat, play at, pluck at, pneumat, pneumat-, poke at, polecat, popat, porat, prayer mat, prevatt, prevatte, prostat-, pull at, qismat, quail at, rat-tat, redcat, redhat, red bat, reichsrat, rice rat, ronstadt, roof rat, rugrat, run-flat, sabbat, sadat, sairat, saltcat, sam & cat, sand cat, sand rat, sarratt, sarsat, schallplatte, seacat, sea mat, sebat, sehcat, shine at, shop at, shtrafbat, sifat, sigcat, silat, smartcat, snapchat, snap at, sno-cat, snowcat, socat, somat, south platte, specat, sphynx cat, standpat, stand pat, starsat, stay at, stonecat, stripchat, such that, susat, tapat, therat, thereat, tib-cat, tipcat, tomat, tomcat, topcat, torchat, to that, trade rat, traumat, true cat, tvsat, uncat, unhat, unplat, urstadt, verrat, wall-plat, weechat, werecat, wesat, wharf rat, whereat, whirlbat, wild-cat, wildcat, wing flat, wink at, with that, wombat, wood-rat, woodchat, wood rat, 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, beaver rat, become flat, bellingcat, bell the cat, bengal cat, big brown bat, bridle at, bristle at, bundesrat, bureaucrat, burmese cat, butterfat, camostat, caveat, channel cat, chemostat, chow yun-fat, civet cat, clarostat, clinostat, cocomat, compumat, concinnate, connive at, copycat, cosmocrat, cotton rat, coup d'etat, cricket bat, cryostat, cryptocat, dabble at, democrat, demokrat, desert rat, 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, norway rat, ochlocrat, ocicat, old world chat, orange bat, orlistat, orthostat, pallas's cat, pallid bat, panamsat, pancreat, pancreat-, panipat, panther cat, parmalat, persian cat, photostat, pit-a-pat, pitapat, pitty-pat, pizza rat, plutocrat, pocket rat, pulicat, pussycat, pyrostat, railroad flat, rampurhat, rat-a-tat, rat-tat-tat, reformat, reostat, rheocrat, rosenblatt, scaredy-cat, semarnat, semimat, semimatte, sewer rat, shaktipat, she's all that, 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, water rat, welcome mat, westerplatte, what does that, wikistrat, windirstat, winefat, 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, cephalostat, chinchilla rat, chip away at, cobicistat, coelostat, data format, domestic cat, dwarf pocket rat, edible fat, egyptian cat, false vampire bat, febuxostat, gamarjobat, gerontocrat, hierogrammat, humidistat, intercombat, jehosaphat, judeo-tat, junooniyat, kangaroo rat, little brown bat, mabalacat, magnificat, masterformat, meritocrat, microformat, monochromat, mortal combat, naked mole rat, oliver platt, opossum rat, 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, marsupial rat, microhabitat, mutessarifat, orange horseshoe bat, ord kangaroo rat, panobinostat, schwarzburg-rudolstadt, wechselapparat

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

7 syllables:
palaeologus-montferrat

8 syllables:
landkreuzer p. 1000 ratte