Breadcrumb Home > Thesaurus > M Synonyms of molybdenum Find synonyms for: Noun 1. molybdenum, Mo, atomic number 42, metallic element, metal usage: a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of molybdenum (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: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language