/ Thesaurus / W Synonyms of water supply Find synonyms for: Noun1. water system, water supply, water, facility, installationusage: a facility that provides a source of water; "the town debated the purification of the water supply"; "first you have to cut off the water"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language