euphoria
bliss, ecstasy, elation, exaltation, exhilaration, exultation, glee, high spirits, intoxication, joy, joyousness, jubilation, rapture, transport
Antonyms
depression, despair, despondency, dolefulness, downheartedness, dumps (informal) gloominess, hopelessness, low spirits, melancholia, melancholy, sadness, the blues