/ Thesaurus / S Synonyms of sump pump Find synonyms for: Noun1. sump pump, suction pumpusage: a suction pump for removing liquid from a sumpWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language