exultation comes to mind
Elan
The word enthusiasm means intense enjoyment or interest.
Pep
gusto
Awesome is a word meaning great that starts with A.
zeal
"Vigor" is a word that means having a lot of energy or enthusiasm.
From an early age, he had a great enthusiasm for camping and exploring. The enthusiasm of the fans was obvious from the roar that filled the stadium.
Amazing
exuberance excitement
The word is magnificent.
flounder