facial gesture vs laugh

facial gesture and laugh both are nouns.

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

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

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

facial gesture (noun)	laugh (noun)
a gesture executed with the facial muscles	the sound of laughing
	a humorous anecdote or remark intended to provoke laughter
	a facial expression characteristic of a person laughing

facial gesture (verb)	laugh (verb)
	produce laughter