sluicegate vs floodgate

sluicegate and floodgate both are nouns.

Word	Noun	Adjective	Verb	Adverb
sluicegate	Yes	No	No	No
floodgate	Yes	No	No	No

As nouns, sluicegate and floodgate are synonyms defined as:

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

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

sluicegate (noun)	floodgate (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
	something that restrains a flood or outpouring