The word alacrity might be the one that fits the bill.
Swiftly means to do something quickly and with great speed or promptness.
The term 'readiness' refers to being prepared or ready for something. It may also refer to being willing to do something or being available for whatever may be about to happen.
The word 'promptly' is the adverb form of the adjective prompt.The abstract noun form for the adjective 'prompt' is promptness.
"Spiritless" is the opposite of enthusiastic.
The head cheerleader was very enthusiastic.
My friend is very enthusiastic!
Enthusiastic
youre subconsciously doing something
There is no concrete noun form for the verb 'enthuse'.The noun form of the verb to enthuse is enthusiasm, an abstract noun; a word for a strong feeling of active interest in something; a word for an emotion.
illegal
To say the word enthusiastic in French you say the word enthousiaste. In the Italian language this word is said as entusiasta.
Romanticism refers to doing something for love.