facial gesture vs face

facial gesture and face both are nouns.

Word	Noun	Adjective	Verb	Adverb
facial gesture	Yes	No	No	No
face	Yes	No	Yes	No

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

Other hyponyms of facial gesture include emoticon, gape, grimace, frown, scowl, grin, grinning, smile, smiling, laugh, snarl, straight face, wink, wince.

facial gesture (noun)	face (noun)
a gesture executed with the facial muscles	a vertical surface of a building or cliff
	the side upon which the use of a thing depends (usually the most prominent surface of an object)
	the striking or working surface of an implement
	the general outward appearance of something
	status in the eyes of others
	impudent aggressiveness
	the feelings expressed on a person's face
	the front of the human head from the forehead to the chin and ear to ear
	the part of an animal corresponding to the human face
	a specific size and style of type within a type family
	a contorted facial expression
	a surface forming part of the outside of an object
	a part of a person that is used to refer to a person

facial gesture (verb)	face (verb)
	deal with (something unpleasant) head on
	present somebody with something, usually to accuse or criticize
	oppose, as in hostility or a competition
	line the edge (of a garment) with a different material
	cover the front or surface of
	turn so as to face; turn the face in a certain direction
	turn so as to expose the face
	be oriented in a certain direction, often with respect to another reference point; be opposite to
	be opposite