gathering vs sewing

gathering and sewing both are nouns.

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

As nouns, sewing is a hypernym of gathering; that is, sewing is a word with a broader meaning than gathering:

gathering: sewing consisting of small folds or puckers made by pulling tight a thread in a line of stitching
sewing: needlework on which you are working with needle and thread

Other hypernyms of gathering include stitchery.

gathering (noun)	sewing (noun)
the social act of assembling	joining or attaching by stitches
the act of gathering something	needlework on which you are working with needle and thread
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