/ Thesaurus / B Synonyms of black guillemot Find synonyms for: Noun1. black guillemot, Cepphus grylle, guillemotusage: northern Atlantic guillemotWordNet 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