/ Thesaurus / W Synonyms of water on the knee Find synonyms for: Noun1. water on the knee, hydrarthrosisusage: hydrarthrosis affecting the kneeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language