assemble vs crowd

assemble is not a noun while crowd is a noun.

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

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

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

assemble (verb)	crowd (verb)
create by putting components or members together	to gather together in large numbers
collect in one place	cause to herd, drive, or crowd together
get people together	approach a certain age or speed
	fill or occupy to the point of overflowing