Breadcrumb Home > Thesaurus > O Synonyms of oculus sinister Find synonyms for: Noun1. oculus sinister, OS, eye, oculus, opticusage: the left eyeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: unctuous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language