1 syllable:
-derm, -sperm, berm, chirm, churme, derm-, ferm, ferme, firm, firme, from, germ, germe, herm, herme, hurm, mp erm, phirm, scherm, schirm, sherm, sperm, squirm, sturm, tc erm, term, terme, therm, therm-, therme, thurm, verme, worm, wurm

2 syllables:
affirm, affirme, afirm, bandwurm, beard worm, bildschirm, caseworm, confirm, confirme, cutworm, degerm, deperm, devshirme, dew worm, earthworm, fireworm, fishworm, flukeworm, full-term, full term, gapeworm, half-term, heartworm, hold firm, horseworm, inchworm, inerm, inerme, infirm, inserm, ismrm, kirchturm, landsturm, late-term, law firm, leuchtturm, long-term, longterm, maltworm, midterm, near-term, nonterm, obfirm, ohrwurm, oosperm, outterm, pileworm, red worm, rootworm, roseworm, russwurm, schneesturm, school term, seatworm, short-term, shortterm, stand firm, tapeworm, tongueworm, tongue worm, tubeworm, unfirm, volkssturm, wheatworm, wheat germ, wireworm, woodworm, xterm, zoosperm

3 syllables:
androderm, angleworm, army worm, arthroderm, aussichtsturm, bioherm, biotherm, bladder worm, business firm, chrysosperm, counterterm, decatherm, diasyrm, disaffirm, disconfirm, ectotherm, endoderm, endosperm, endotherm, epiderm, episperm, estraderm, eurytherm, exoderm, exotherm, fishing worm, geotherm, guinea worm, gymnosperm, haematherm, hematherm, homotherm, hypoderm, incoterm, isotherm, lidoderm, longer-term, major term, megaderm, megatherm, mesoderm, mesosperm, mesotherm, messeturm, microtherm, middle term, minor term, misaffirm, monosperm, nicoderm, opentherm, pachyderm, peanut worm, periderm, perisperm, phelloderm, pickleworm, placoderm, pododerm, podosperm, prison term, psorosperm, pteridosperm, railroad worm, reaffirm, reconfirm, regenschirm, regenwurm, remain firm, rhodosperm, ribbon worm, sarcoderm, scleroderm, service firm, spermoderm, spindleworm, stenoderm, stenotherm, tatzelwurm, trophoderm, trophosperm, velvet worm, zygosperm

4 syllables:
accounting firm, angiosperm, annelid worm, army cutworm, brokerage firm, carry to term, consulting firm, echinoderm, electrotherm, erythra-derm, geoisotherm, heterotherm, homeotherm, homoiotherm, insurance firm, investment firm, isallotherm, malacoderm, measuring worm, medium-term, melanosperm, osteoderm, ostracoderm, poikilotherm, potato worm, proboscis worm, progymnosperm, publishing firm, removal firm, segmented worm, syphiloderm, tomato worm, vinegar worm

5 syllables:
academic term, chordamesoderm, chordomesoderm, degree of a term, isobathytherm, isodrosotherm, isogeotherm, olympiaturm, parasitic worm, presidential term, securities firm

6 syllables:
intermediate-term

2 syllables:
hookworm