Synonyms for arm

noun

1. The upper human limb

   member, appendage, forelimb, forearm, fin*, soupbone*.

2. Anything resembling an arm, sense 1

   bend, crook, projection, cylinder, sofa-end, branch, limb, appendage, rod, assembly, bough, offshoot, wing, prong, stump, hook, handle, bow, sleeve.

3. A narrow stretch of water

   inlet, tributary, subdivision, branch, stream, estuary, sound, creek, run, brook, rivulet; see also bay.

4. A weapon

   implement of war, gun, firearm; see arms 1.

5. A branch

   division, department, unit; see branch 1.

at arm's length

with open arms

verb

1. To equip

   supply, outfit, furnish; see provide 1.

2. To equip with weapons

   furnish weapons, prepare for combat, load, give firearms, issue weapons, equip with arms, accouter, array, gird, outfit, fit out, supply with instruments of warfare, provide with arms, munition, fortify. See syn. study at furnish.

   Antonyms disarm*, demilitarize, deactivate.