gathering vs harvest

gathering and harvest both are nouns.

Word	Noun	Adjective	Verb	Adverb
gathering	Yes	No	No	No
harvest	Yes	No	Yes	No

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

Other hyponyms of gathering include centralisation, centralization, harvest home, harvesting.

gathering (noun)	harvest (noun)
the social act of assembling	the season for gathering crops
the act of gathering something	the gathering of a ripened crop
sewing consisting of small folds or puckers made by pulling tight a thread in a line of stitching	the consequence of an effort or activity
a group of persons together in one place	the yield from plants in a single growing season

gathering (verb)	harvest (verb)
	remove from a culture or a living or dead body, as for the purposes of transplantation
	gather, as of natural products