/ Thesaurus / W Synonyms of wasteweir Find synonyms for: Noun1. spillway, spill, wasteweir, conduitusage: a channel that carries excess water over or around a dam or other obstructionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: imprudent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language