/ Thesaurus / M Synonyms of mountain bike Find synonyms for: Noun1. mountain bike, all-terrain bike, off-roader, bicycle, bike, wheel, cycleusage: a bicycle with a sturdy frame and fat tires; originally designed for riding in mountainous countryWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language