The answer is: experience.
Enthusiasm, at its root, implies one that is overtaken by the gods. More colloquially, it is related to a state of excitement, power, joy, and affirmation of something peculiar and exceptional.
As such, the word experience, which philosophers usually relate to habit or to categories of the mind to make sense of the world around us and of ourselves, does not imply (or it does not create a tone) for enthusiasm, rather it is associated to everyday life and common sense.