/ Thesaurus / W Synonyms of weil's disease Find synonyms for: Noun1. Weil's disease, swamp fever, leptospirosisusage: a severe form of leptospirosis in human beingsWordNet 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