arm vs armor

arm and armor both are nouns.

Word	Noun	Adjective	Verb	Adverb
arm	Yes	No	Yes	No
armor	Yes	No	Yes	No

arm (noun)	armor (noun)
the part of a garment that is attached at the armhole and that provides a cloth covering for the arm	tough more-or-less rigid protective covering of an animal or plant
any instrument or instrumentality used in fighting or hunting	protective covering made of metal and used in combat
the part of an armchair or sofa that supports the elbow and forearm of a seated person	a military unit consisting of armored fighting vehicles
any projection that is thought to resemble a human arm
a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb
a division of some larger or more complex organization

arm (verb)	armor (verb)
prepare oneself for a military confrontation	equip with armor
supply with arms