/ Thesaurus / P Synonyms of prosopium cylindraceum Find synonyms for: Noun1. round whitefish, Menominee whitefish, Prosopium cylindraceum, whitefishusage: a whitefish with a bronze back; of northern North America and SiberiaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language