/ Thesaurus / S Synonyms of sluicegate Find synonyms for: Noun1. sluicegate, sluice valve, floodgate, penstock, head gate, water gate, regulatorusage: regulator consisting of a valve or gate that controls the rate of water flow through a sluiceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language