gathering vs harvesting

gathering and harvesting both are nouns.

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

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

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

gathering (noun)	harvesting (noun)
the social act of assembling	the gathering of a ripened crop
the act of gathering something
sewing consisting of small folds or puckers made by pulling tight a thread in a line of stitching
a group of persons together in one place