2 syllables:
besar, besor, besser, blesser, 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, schlesser, sesar, sesser, specer, stressor, tessar, tresor, tresser, vesser

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

4 syllables:
abastecer, aborrecer, acquiescer, antecessor, apetecer, buttermesser, co-assessor, co-processor, coalescer, corepressor, decompressor, dispossessor, intercessor, predecessor, prepossessor, repossessor, second-guesser, vasopressor, vinedresser, window-dresser

5 syllables:
moto-compressor, multi-processor, multiprocessor, underpossessor, uniprocessor, vasodepressor

6 syllables:
immunosuppressor

3 syllables:
rochester

5 syllables:
microprocessor