Breadcrumb Home > Thesaurus > P Synonyms of penstock Find synonyms for: Noun 1. sluicegate, sluice valve, floodgate, penstock, head gate, water gate, regulator usage: regulator consisting of a valve or gate that controls the rate of water flow through a sluice 2. sluice, sluiceway, penstock, conduit usage: conduit that carries a rapid flow of water controlled by a sluicegate WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of penstock (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: bilious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language