1 syllable:
arm, bpharm, charm, charme, farm, flarm, harm, hdparm, larme, naarm, parme, pharm, scarm, sdarm, sharm, smarm, tharm

2 syllables:
a-arm, alarm, alarme, allarme, becharm, blinddarm, decharm, desarme, disarm, ducharme, ex-arm, firearm, fish-farm, forearm, gendarme, genpharm, gisarm, gisarme, guisarme, home-farm, iclarm, inarm, longarm, mallarme, non-farm, nonfarm, nufarm, polearm, prearm, proof-arm, pycharm, re-arm, rearm, round-arm, sadarm, self-harm, short-arm, side arm, simfarm, small-arm, stiff-arm, straight-arm, strong-arm, strongarm, stud farm, tonearm, tone arm, tree farm, truck farm, tulkarm, unarm, uncharm, windfarm, yard-arm, yardarm

3 syllables:
aquafarm, bioarm, buy the farm, canadarm, cattle farm, clarkson's farm, contact arm, countercharm, dairy farm, disencharm, funny farm, good luck charm, love alarm, moneyfarm, novopharm, over-arm, overarm, pickup arm, prison farm, rocker arm, sewage farm, smoke alarm, super-pharm, under-arm, underarm, unicharm, wiper arm, writing arm

4 syllables:
burglar alarm, collective farm, enobosarm, fire alarm, pneumatogarm, zonealarm

6 syllables:
allisyn ashley arm, repeating firearm

7 syllables:
automatic firearm

9 syllables:
semiautomatic firearm

1 syllable:
term, corm, dorm, firm, form, germ, norm, sperm, squirm, storm, swarm, therm, warm, worm

2 syllables:
affirm, age norm, art form, beard worm, bound form, cairngorm, change form, claim form, confirm, conform, deform, dew worm, dust storm, free form, full-term, full term, hold firm, ice storm, infirm, inform, law firm, leaf form, life form, line storm, long-term, lukewarm, perform, red worm, reform, school term, short-term, stand firm, take form, tax form, tongue worm, transform, unfirm, verse form, wave form, wheat germ, word form

3 syllables:
army worm, bladder worm, business firm, endoderm, episperm, fishing worm, guinea worm, isotherm, land reform, major term, mesoderm, middle term, minor term, misinform, order form, peanut worm, plural form, prison term, railroad worm, reaffirm, reconfirm, remain firm, ribbon worm, service firm, silver storm, velvet worm

4 syllables:
accounting firm, annelid worm, brokerage firm, carry to term, citation form, combining form, consulting firm, electric storm, insurance firm, investment firm, magnetic storm, measuring worm, meteor swarm, potato worm, proboscis worm, publishing firm, removal firm, segmented worm, singular form, sonata form, telegraph form, tomato worm, vinegar worm, violent storm

5 syllables:
academic term, application form, chordamesoderm, chordomesoderm, degree of a term, electrical storm, parasitic worm, presidential term, securities firm

7 syllables:
operation desert storm