crowd vs jam

crowd and jam both are nouns.

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

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

Other hyponyms of crowd include army, crush, press, drove, horde, swarm, huddle, mob, rabble, rout, phalanx, flock, troop.

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

Other hyponyms of crowd include mass, overcrowd, pour, pullulate, stream, swarm, teem, herd, mob, pack, pile, throng.

crowd (noun)	jam (noun)
a large number of things or people considered together	deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
an informal body of friends	preserve of crushed fruit
	a dense crowd of people
	informal terms for a difficult situation

crowd (verb)	jam (verb)
to gather together in large numbers	interfere with or prevent the reception of signals
cause to herd, drive, or crowd together	crowd or pack to capacity
approach a certain age or speed	get stuck and immobilized
fill or occupy to the point of overflowing	block passage through
	crush or bruise
	press tightly together or cram
	push down forcibly