1) Alacrity 2) Ardor 3) Ardour 4) Avidity 5) Avidness 6) Ecstasy 7) Elan 8) Enthusiasm 9) Expectation 10) Forwardness 11) Keenness 12) Passion 13) Readiness 14) Willingness 15) Zeal 1) Ardour 2) Avidity 3) Avidness 4) Dedication 5) Devotion 6) Enthusiasm 7) Fanaticism 8) Fervour 9) Gusto 10) Intensity 11) Interest 12) Keenness 13) Passion 14) Prompt willingness 15) Promptness 16) Quickness 17) Rapidity 18) Readiness 19) Speed 20) Swiftness 21) Wholeheartedness 22) Zeal 23) Zest 
• (n.) The state or quality of being eager; ardent desire. • (n.) Tartness; sourness.
Ea'ger·ness noun 1. The state or quality of being eager; ardent desire. 'The eagerness of love.' Addison. 2. Tartness; sourness. [ Obsolete] Syn. -- Ardor; vehemence; earnestness; impetuosity; heartiness; fervor; fervency; avidity; zeal; craving; heat; passion; g...
[n] - a positive feeling of wanting to push ahead with something
zeal noun 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`avidity 1 avidness noun a positive feeling of wanting to push ahead with something