gesture vs gesticulate

gesture is a noun but gesticulate is not a noun.

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

As verbs, gesture and gesticulate are synonyms defined as:

Other synonyms of gesture include motion.

gesture (noun)	gesticulate (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)	gesticulate (verb)
show, express or direct through movement	show, express or direct through movement