'an unknown amount' 'an unknown island' 'an unknown writer' 'an unknown source' Known, famed, illustrious, suspected, best-known, proverbial, onymous, legendary, famous, far-famed, celebrated, well-known, glorious, familiar, better-known, noted, identified, renowned, notable Unknown region, extraterrestrial, stranger, terra incognita, unknown quantity, alien, noncitizen, outlander, extraterrestrial being, foreignerĪ variable whose values are solutions of an equation Illustrious, far-famed, noted, renowned, glorious, identified, known, better-known, well-known, suspected, legendary, proverbial, celebrated, familiar, famed, notable, best-known, famous, onymous Stranger, unknown quantity, terra incognita, unknown region, alienĪnyone who does not belong in the environment in which they are found Illustrious, familiar, celebrated, notable, better-known, known, proverbial, noted, best-known, far-famed, onymous, legendary, identified, suspected, famed, well-known, famous, glorious, renowned Unknown, unknown region, terra incognita noun Princeton's WordNet Rate these antonyms: 4.8 / 4 votes
