/ Thesaurus / C Synonyms of circus pygargus Find synonyms for: Noun1. Montagu's harrier, Circus pygargus, harrierusage: brownish European harrierWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language