forgather vs crowd

forgather is not a noun while crowd is a noun.

Word	Noun	Adjective	Verb	Adverb
forgather	No	No	Yes	No
crowd	Yes	No	Yes	No

As verbs, crowd is a hyponym of forgather; that is, crowd is a word with a more specific, narrower meaning than forgather:

forgather (noun)	crowd (noun)
	a large number of things or people considered together
	an informal body of friends

forgather (verb)	crowd (verb)
collect in one place	to gather together in large numbers
	cause to herd, drive, or crowd together
	approach a certain age or speed
	fill or occupy to the point of overflowing