pour vs sluice

pour is not a noun while sluice is a noun.

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

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

Other hyponyms of pour include sheet, sluice down.

pour (noun)	sluice (noun)
	conduit that carries a rapid flow of water controlled by a sluicegate

pour (verb)	sluice (verb)
move in large numbers	irrigate with water from a sluice
flow in a spurt	draw through a sluice
cause to run	transport in or send down a sluice
pour out gradually, so as to separate out sediment	pour as if from a sluice
supply in large amounts or quantities
rain heavily