Breadcrumb Home > Thesaurus > M Synonyms of mainmast Find synonyms for: Noun 1. mainmast, mast usage: the chief mast of a sailing vessel with two or more masts WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of mainmast (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