2 syllables:
after, after-, crafter, dafter, drafter, grafter, hafter, laughter, rafter, shafter

3 syllables:
atafter, be after, chase after, come after, go after, hereafter, ingrafter, lech after, lenscrafter, look after, lust after, point after, quest after, sought-after, sought after, take after, thereafter, whereafter, woodcrafter

4 syllables:
endeverafter, fore-and-after, hereinafter, ivacaftor, lumacaftor, telecrafter, thereinafter

6 syllables:
shrek forever after

8 syllables:
musicforthemorningafter

2 syllables:
asker, asper, aster, caspar, casper, caster, castor, faster, jasper, lascar, master, pastor, plaster, raster

3 syllables:
brontosaur, sloganeer, hosteller, monitor, hollander, godmother, nodular, polymer, proposer, jocular, cockchafer, sodbuster, popular, cocklebur, modeler, hogchoker, goddaughter, commodore, colander, columnar, alcazar, oliver, blockbuster, pompadour, bolivar, gospeler, modeller, monomer, commissar, globular, onager, almoner, stomacher, gobbler, gossamer, commoner, nonpolar, pothunter, conifer, nothosaur, gossiper, slopseller, beach aster, bog aster, cadaster, court plaster, disaster, drill master, headmaster, heath aster, old master, past master, piaster, pilaster, rush aster, sea aster, shinplaster, smooth aster, starved aster, stiff aster, wood aster

4 syllables:
biographer, atmometer, picometer, spectrometer, cryometer, psychrometer, tachometer, spherometer, manometer, astronomer, algometer, hodometer, unpopular, decametre, bilocular, demographer, photographer, pornographer, binocular, clinometer, bolometer, philosopher, kilometer, astrologer, speedometer, subocular, thermometer, geographer, reconciler, odometer, siphonophore, hygrometer, chronometer, micrometer, hydrometer, azure aster, bushy aster, china aster, genus aster, genus castor, golden aster, lath and plaster, madagascar, mustard plaster, myocastor, new york aster, oleaster, prairie aster, question master, riding master, sailing master, small white aster, southern aster, sticking plaster, sticky aster, white wood aster, willow aster

5 syllables:
interlocutor, lexicographer, gas thermometer, salinometer, densitometer, myriameter, choreographer, piezometer, variometer, ovipositor, dynamometer, anemometer, katharometer, mass spectrometer, audiometer, mileometer, vinyl polymer, goniometer, galvanometer, sensitometer, inclinometer, actinometer, declinometer, tacheometer, magnetometer, adhesive plaster, calico aster, cornflower aster, goldilocks aster, late purple aster, mojave aster, new england aster, property master, rattlesnake master, tansy leaf aster, upland white aster, white prairie aster

6 syllables:
interferometer, autobiographer, accelerometer, cinematographer, sphygmomanometer, evaporometer, telethermometer, aromatic aster, hairy golden aster, prairie golden aster

7 syllables:
clinical thermometer, resistance thermometer, radiomicrometer, eastern silvery aster, maryland golden aster, western silvery aster

8 syllables:
electrodynamometer, perennial salt marsh aster

9 syllables:
radio interferometer