disarm vs arm

disarm is not a noun while arm is a noun.

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

disarm (noun)	arm (noun)
	the part of a garment that is attached at the armhole and that provides a cloth covering for the arm
	any instrument or instrumentality used in fighting or hunting
	the part of an armchair or sofa that supports the elbow and forearm of a seated person
	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

disarm (verb)	arm (verb)
remove offensive capability from	prepare oneself for a military confrontation
take away the weapons from; render harmless	supply with arms
make less hostile; win over