Synonyms for Triumphant (same or very similar meaning)
WordNet sense 1 (joyful and proud especially because of triumph or success):
exultant, jubilant, prideful, rejoicing, triumphal, exultingWordNet sense 2 (exultantly proud and joyful; in high spirits):
elatedWordNet sense 3 (experiencing triumph):
victoriousFrom the ODE community, based on WordNetadd/edit