foursome vs gathering

foursome and gathering both are nouns.

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

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

Other hypernyms of foursome include assemblage.

foursome (noun)	gathering (noun)
four people considered as a unit	the social act of assembling
the cardinal number that is the sum of three and one	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