1 syllable:
atz, bats, batse, batts, batz, blats, blatz, brats, bratz, cat's, cats, catts, ccats, chats, chatz, chatz', dats, datz, fats, flats, frats, gatts, gatz, glatz, gnats, grats, gratz, hat's, hats, hatz, jpats, kats, katz, katze, kratz, lats, lattes, latz, mats, mattes, matts, matz, nats, pat's, pats, patz, plats, platts, platz, pmd ats, prats, pratt's, pratts, rat's, rats, ratts, ratz, satz, scats, schatz, shatz, skats, slats, smats, smt ats, spats, spatz, splats, sprats, stats, statz, stratz, tatts, that's, thats, vats

2 syllables:
abats, acats, adats, and that's, annats, arhats, at-bats, aussatz, awstats, bathmats, bearcats, begats, brickbats, bullbats, chitchats, combats, congrats, cowpats, cushats, diktats, dingbats, doormats, ducats, einsatz, ex-pats, expats, fiat's, fiats, flugplatz, formats, haemat-, hardhats, hauptsatz, hellcats, hepcats, hi-hats, high-hats, housecats, jurats, kid-e-cats, labatt's, mapats, marktplatz, meerkats, mudcats, mudflats, numbats, oshatz, parkplatz, placemats, polecats, rugrats, sabbats, sadat's, spielplatz, tomcats, whinchats, wildcats, wombats, yachats, zusatz

3 syllables:
achromats, acrobats, aerostat's, aerostats, apparats, appestats, arbeitsplatz, assignats, autocrats, automats, badavatz, bebelplatz, bodensatz, bodenschatz, bureaucrats, caveats, chemostats, cmats, copycats, coseratz, cryostats, datensatz, democrat's, democrats, democrats', diplomat's, diplomats, diplomats', dixiecrats, firebrats, habitat's, habitats, haemostats, hemostats, laundromats, marienplatz, photostats, pitapats, plutocrats, pussycats, reformats, rheostats, rosenblatts, scaredy-cats, technocrats, theocrats, thermostats, thundercats, umschlagplatz, ziggurats

4 syllables:
he-man/thundercats, meritocrats, physiocrats, siderostats

5 syllables:
8 out of 10 cats, alexanderplatz, bacteriostats, coccidiostats, image file formats, microhabitats, the aristocats

3 syllables:
bristlegrass, ripple-grass, spindleshanks