(n.) A cheerful readiness, willingness; briskness; sprightliness; as, the soldiers advanced with alacrity\ to meet the enemy.

abruptness acquiescence agility agreeability agreeableness amenability animation anxiety anxiousness appetite ardor avidity avidness breathless impatience briskness cheerful consent cheerful readiness compliance consent cooperativeness decisiveness dispatch docility eagerness elan enthusiasm expedition expeditiousness favorable disposition favorableness fervor feverishness forwardness furiousness gameness goodwill gust gusto hastiness heartiness hurriedness immediacy immediateness impatience impetuosity impetuousness impulsiveness instantaneousness keen desire keenness life liveliness nimbleness pliability pliancy precipitance precipitancy precipitation precipitousness promptitude promptness punctuality punctualness quickness rapidity rashness readiness receptive mood receptiveness receptivity responsiveness right mood sharpness smartness speed speediness spirit spryness suddenness summariness swiftness tractability ungrudgingness unloathness unreluctance verve vitality vivacity willing ear willing heart willingness zeal zealousness zest zestfulness