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, proof-arm, pycharm, re-arm, rearm, round-arm, sadarm, schoolmarm, 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:
squirm, firm, therm, corm, form, dorm, worm, germ, swarm, sperm, norm, warm, storm, term

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

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

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

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

7 syllables:
operation desert storm