motion vs gesture

motion and gesture both are nouns.

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

As nouns, gesture is a hyponym of motion; that is, gesture is a word with a more specific, narrower meaning than motion:

motion: a change of position that does not entail a change of location
gesture: motion of hands or body to emphasize or help to express a thought or feeling

As nouns, motion and gesture are synonyms defined as:

motion and gesture: the use of movements (especially of the hands) to communicate familiar or prearranged signals

As verbs, motion and gesture are synonyms defined as:

Other synonyms of motion include gesticulate.

motion (noun)	gesture (noun)
a change of position that does not entail a change of location	motion of hands or body to emphasize or help to express a thought or feeling
the act of changing location from one place to another	something done as an indication of intention
the use of movements (especially of the hands) to communicate familiar or prearranged signals	the use of movements (especially of the hands) to communicate familiar or prearranged signals
a formal proposal for action made to a deliberative assembly for discussion and vote
a natural event that involves a change in the position or location of something
an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
a state of change

motion (verb)	gesture (verb)
show, express or direct through movement	show, express or direct through movement