/ Thesaurus / W Synonyms of water main Find synonyms for: Noun1. water main, mainusage: main (a pipe or conduit) for conveying waterWordNet 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