Breadcrumb Home > Thesaurus > C Synonyms of cobalt Find synonyms for: Noun 1. cobalt, Co, atomic number 27, metallic element, metal usage: a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of cobalt (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language