ardor in WordNet English dictionary

1. intense feeling of love
   ardor  ardour 
   
2. a feeling of strong eagerness (usually in favor of a person or cause)
   "they were imbued with a revolutionary ardor"; "he felt a kind of religious zeal"
   ardor  ardour  elan  zeal 
   
3. feelings of great warmth and intensity
   "he spoke with great ardor"
   ardor  ardour  fervor  fervour  fervency  fire  fervidness