zeal

nouns

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"
is derived from
excessive fervor to do something or accomplish some end
"he had an absolute zeal for litigation"
is derived from
is a type of (narrower)
feelings of great warmth and intensity
"he spoke with great ardor"
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"