pour vs spout

pour is not a noun while spout is a noun.

Word	Noun	Adjective	Verb	Adverb
pour	No	No	Yes	No
spout	Yes	No	Yes	No

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

Other hyponyms of pour include gush, spirt, spurt, regurgitate.

pour (noun)	spout (noun)
	an opening that allows the passage of liquids or grain

pour (verb)	spout (verb)
move in large numbers	talk in a noisy, excited, or declamatory manner
flow in a spurt	gush forth in a sudden stream or jet
cause to run
pour out gradually, so as to separate out sediment
supply in large amounts or quantities
rain heavily