army vs crowd

army and crowd both are nouns.

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

As nouns, crowd is a hypernym of army; that is, crowd is a word with a broader meaning than army:

army (noun)	crowd (noun)
a permanent organization of the military land forces of a nation or state	a large number of things or people considered together
a large number of people united for some specific purpose	an informal body of friends

army (verb)	crowd (verb)
	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