pour out vs swarm

pour out is not a noun while swarm is a noun.

Word	Noun	Adjective	Verb	Adverb
pour out	No	No	Yes	No
swarm	Yes	No	Yes	No

As verbs, swarm is a hypernym of pour out; that is, swarm is a word with a broader meaning than pour out:

Other hypernyms of pour out include pour, pullulate, stream, teem.

pour out (noun)	swarm (noun)
	a group of many things in the air or on the ground
	a moving crowd

pour out (verb)	swarm (verb)
express without restraint	move in large numbers
pour out gradually, so as to separate out sediment	be teeming, be abuzz
be disgorged
pour out liberally