forearm vs gird

forearm is a noun but gird is not a noun.

Word	Noun	Adjective	Verb	Adverb
forearm	Yes	No	Yes	No
gird	No	No	Yes	No

As verbs, gird is a hypernym of forearm; that is, gird is a word with a broader meaning than forearm:

Other hypernyms of forearm include arm, build up, fortify.

forearm (noun)	gird (noun)
the part of the superior limb between the elbow and the wrist

forearm (verb)	gird (verb)
arm in advance of a confrontation	prepare oneself for a military confrontation
	bind with something round or circular
	put a girdle on or around