/ Thesaurus / B Synonyms of black water Find synonyms for: Noun1. blackwater, diseaseusage: any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cellsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: knead Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language