girdle vs gird

girdle is a noun but gird is not a noun.

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

As verbs, girdle and gird are synonyms defined as:

girdle (noun)	gird (noun)
a woman's close-fitting foundation garment
a band of material around the waist that strengthens a skirt or trousers
an encircling or ringlike structure

girdle (verb)	gird (verb)
put a girdle on or around	prepare oneself for a military confrontation
cut a girdle around so as to kill by interrupting the circulation of water and nutrients	bind with something round or circular
	put a girdle on or around