/ Thesaurus / U Synonyms of unsubduable Find synonyms for: Adjective1. indomitable, never-say-die, unsubduable, unconquerable (vs. conquerable)usage: impossible to subdueWordNet 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