ardor, ardour, Elan, zealousy, fervour, passion, fervor, missionary zeal, enthusiasm, vehemence, more...

apathy, indifference, lethargy, disinterest, listlessness

religious zeal, national zeal, enthusiasm, passion, eagerness, excitement, devotion, more...

religious, great, missionary, much, excessive, ardent, revolutionary, patriotic, holy, equal, untiring

vigorous enthusiasm,   intense devotion,   passion or fervor,   great enthusiasm,   burning passion,   intense enthusiasm,   extreme passion,   religious fervor,   sincere enthusiasm,   extreme enthusiasm