Breadcrumb Home > Thesaurus > F Synonyms of fm Find synonyms for: Noun 1. frequency modulation, FM, modulation usage: modulation of the frequency of the (radio) carrier wave 2. fermium, Fm, atomic number 100, metallic element, metal usage: a radioactive transuranic metallic element produced by bombarding plutonium with neutrons WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fm (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: inmediasres Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language