/ Thesaurus / B Synonyms of black fritillary Find synonyms for: Noun1. mission bells, black fritillary, Fritillaria biflora, fritillary, checkered lilyusage: herb of southwestern United States having dark purple bell-shaped flowers mottled with greenWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language