Example : They were imbued with a revolutionary ardor.
He felt a kind of religious zeal.

Synonyms : ardor, ardour, elan

Example : He had an absolute zeal for litigation.

Example : 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.

Synonyms : eagerness, forwardness, readiness