Breadcrumb Home > Thesaurus Cite Synonyms of mainmast Find synonyms for: Noun1. mainmast, mastusage: the chief mast of a sailing vessel with two or more mastsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: mainmast (Dictionary) Related Content Daily Word Quiz: persiflage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index