triumphant 10 Associations

victorious undefeated (similar term)

unbeaten 8 Associations

unconquered unvanquished undefeated (similar term)

unbowed 7 Associations

undefeated (similar term)

unconquered 11 Associations

unbeaten unvanquished undefeated (similar term)

unvanquished 12 Associations

unbeaten unconquered undefeated (similar term)

victorious 10 Associations

triumphant undefeated (similar term)