zeal in WordNet English dictionary

1. 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 
   
2. prompt willingness
   "readiness to continue discussions"; "they showed no eagerness to spread the gospel"; "they disliked his zeal in demonstrating his superiority"; "he tried to explain his forwardness in battle"
   readiness  eagerness  zeal  forwardness 
   
3. excessive fervor to do something or accomplish some end
   "he had an absolute zeal for litigation"
   zeal