2 syllables:
besar, besor, besser, blesser, bless her, bresser, cesser, cessor, chesser, dresser, dresseur, esser, fesser, fresser, gresser, guesser, hesser, jesser, jessore, kesar, kresser, leser, lesser, lessor, loesser, messer, messr, nesser, pesar, plessor, presser, pressor, press her, schlesser, sesar, sesser, specer, stressor, tessar, tresor, tresser, vesser, yes sir

3 syllables:
abaisser, accessor, addresser, addressor, adresser, aggressor, agresser, agresseur, agressor, assesseur, assessor, beckmesser, bergstresser, caresser, caress her, co-lessor, compresser, compressor, confesar, confesser, confesseur, confessor, cross-dresser, depressor, digresser, egressor, expresser, express her, fluorescer, hairdresser, impresser, impressor, impress her, insessor, kolesar, kompressor, landmesser, lopressor, manesar, obsessor, oppressor, possessor, precessor, processor, prof., profesor, professeur, professor, professore, progresar, redresser, redressor, regressor, relessor, represser, repressor, sublessor, successeur, successor, suppresser, suppressor, thanesar, transgressor, undress her

4 syllables:
abastecer, aborrecer, acquiescer, air compressor, apetecer, buttermesser, co-assessor, co-processor, coalescer, corepressor, decompressor, dispossessor, food processor, full professor, intercessor, predecessor, prepossessor, repossessor, second-guesser, spike suppressor, surge suppressor, tax assessor, vasopressor, vinedresser, window-dresser, window dresser, word processor

5 syllables:
central processor, data processor, english professor, moto-compressor, multi-processor, multiprocessor, underpossessor, uniprocessor, vasodepressor

6 syllables:
assistant professor, immunosuppressor, multi-core processor, visiting professor

7 syllables:
associate professor

2 syllables:
lever, heather, nether, never, leather, thresher, pleasure, clever, fresher, treasure, devoir, ever, aether, weather, heifer, feather, blether, measure, wether, leisure, tether, pressure, zephyr, sever, whether

3 syllables:
together, high pressure, fair weather, square measure, ooze leather, air pressure, whoever, flight feather, bell heather, whenever, dissever, endeavor, sea feather, board measure, at leisure, cold weather, dry measure, whatever, white feather, displeasure, endeavour, refresher, forever, whichever, sound pressure, blood pressure, low pressure, wherever, tape measure, however, whomever

4 syllables:
come together, all together, whatsoever, put together, vapor pressure, altogether, cubic measure, liquid measure, russia leather, hang together, throw together, patent leather, pull together, band together, common measure, high blood pressure, contour feather, get together

5 syllables:
osmotic pressure, linear measure

6 syllables:
barometric pressure, arterial pressure, diastolic pressure, radiation pressure, atmospheric pressure