1 syllable:
behm, bem, blehm, brehm, brem, chem, chem-, clem, dehm, demme, em, emme, femme, flegm, fleme, fremm, gehm, gem, gemme, haem-, hem, hemm, hemme, jem, kehm, kem, khem, klem, klemm, klemme, lem, lemm, m, m., phlegm, prem, rehm, rem, remme, rhem, schemm, schlemm, schwemm, stem, stemm, stemme, strem, swem, temme, thame, them, wg emm

2 syllables:
100 m, a. m., adrem, akyem, alem, baraem, belem, blue stem, brain stem, cacem, condemn, decem, dephlegm, dilemme, eclegm, ekzem, escem, extrem, fm, hakmem, indem, librem, mackem, maremme, medchem, nachdem, novem, of them, p.m., p. m., pm, preem, put them, raychem, regem, restem, rythem, seer-sem, septem, topmem, waremme, zemzem

3 syllables:
200 m, 987fm, a.t.m, a. t. m., aacccm, aahpm, anadem, angenehm, apicem, apophthegm, atm, bethlehem, boney m., brunizem, calcm, cardizem, chppm, cofdm, compuchem, coral gem, cryo-em, d.p.m, diadem, diastem, epithem, g.e.m., i. b. m., ibidem, kfupm, m. g. m., meristem, mgm, microseme, millirem, nectostem, onion stem, opaque gem, pgm, pica em, ppm, precondemn, r.p.m, rpm, santarem, sawceflem, unifem, vofdm, willys mb, zolpidem

4 syllables:
a.a.r.m., a.t.o.m., ask.fm, cfu-gemm, dantdm, difm, diltiazem, facpm, filosofem, indiadem, jeruzalem, jonathan demme, judgement in rem, judgment in rem, kosmos-3m, last.fm, marripalem, ntvdm, onerpm, r.e.m., socitm, tkb-022pm, transparent gem, vitamin m, vizier-azem

5 syllables:
adpcm, ccapm, feature.fm, kmfdm, libre.fm, saalbach-hinterglemm, star-of-bethlehem, stars-of-bethlehem

6 syllables:
bbfbbm, bbiafm, c.r.e.a.m.

7 syllables:
balasubramaniem

9 syllables:
t.a.p.o.a.f.o.m.