sluice vs drench

sluice is a noun but drench is not a noun.

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

As verbs, drench is a hypernym of sluice; that is, drench is a word with a broader meaning than sluice:

Other hypernyms of sluice include douse, dowse, soak, sop, souse.

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

sluice (verb)	drench (verb)
irrigate with water from a sluice	cover with liquid; pour liquid onto
draw through a sluice	permeate or impregnate
transport in or send down a sluice	force to drink
pour as if from a sluice	drench or submerge or be drenched or submerged