gesture vs communicate

gesture is a noun but communicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
gesture	Yes	No	Yes	No
communicate	No	No	Yes	No

As verbs, communicate is a hypernym of gesture; that is, communicate is a word with a broader meaning than gesture:

Other hypernyms of gesture include intercommunicate.

gesture (noun)	communicate (noun)
motion of hands or body to emphasize or help to express a thought or feeling
something done as an indication of intention
the use of movements (especially of the hands) to communicate familiar or prearranged signals

gesture (verb)	communicate (verb)
show, express or direct through movement	transmit thoughts or feelings
	transmit information
	be in verbal contact; interchange information or ideas
	receive Communion, in the Catholic church
	administer Communion; in church
	join or connect
	transfer to another