Eagerness

Part of speech: noun (n.)

1. The state or quality of being eager; ardent desire. "The eagerness of love." Addison.

2. Tartness; sourness. [Obs.]

Synonyms: Ardor; vehemence; earnestness; impetuosity; heartiness; fervor; fervency; avidity; zeal; craving; heat; passion; greediness.