1. unconquerable The headstrong person is not to be stopped in his own course of action, while the obstinate and stubborn is not to be driven to another's way. The headstrong act; the obstinate and stubbor Synonyms: obstinate, contumacious, headstrong, mulish, resolute, decided, heady, obdurate, resolved, determined, immovable, opinionated, stubborn, dogged, indomitable, persistent, unconquerable, firm, inflexible, pertinacious, unflinching, fixed, intractable, refractory, unyielding Antonyms: amenable, dutiful, pliable, tractable, complaisant, gentle, pliant, undecided, compliant, irresolute, submissive, wavering, docile, obedient, teachable, yielding
Synonyms for unconquerable 
