Breadcrumb Home > Thesaurus > O Synonyms of optimum Find synonyms for: Noun1. optimum, good, goodnessusage: most favorable conditions or greatest degree or amount possible under given circumstancesAdjective1. optimum, optimal, best (vs. worst)usage: most desirable possible under a restriction expressed or implied; "an optimum return on capital"; "optimal concentration of a drug"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of optimum (Dictionary) ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language