sluice valve vs sluicegate

sluice valve and sluicegate both are nouns.

Word	Noun	Adjective	Verb	Adverb
sluice valve	Yes	No	No	No
sluicegate	Yes	No	No	No

As nouns, sluice valve and sluicegate are synonyms defined as:

sluice valve and sluicegate: regulator consisting of a valve or gate that controls the rate of water flow through a sluice

Other synonyms of sluice valve include floodgate, head gate, penstock, water gate.

sluice valve (noun)	sluicegate (noun)
regulator consisting of a valve or gate that controls the rate of water flow through a sluice	regulator consisting of a valve or gate that controls the rate of water flow through a sluice