/ Thesaurus / R Synonyms of robert gray Find synonyms for: Noun1. Gray, Robert Grayusage: American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language