'Hesitant' is the adjective. 'Reluctant' and 'hesitant' are not the same. I may be reluctant to do something, but still do it fast, with no hesitation. On the other hand, if a person is hesitant, he/she is almost always reluctant.

Hesitant. "Reluctant" could mean the same, but not necessarily.

"Hesitation" is the noun. "Hesitance" is not a word.

i think that there is another adjective from this verb......(Hesitant =reluctant=indecisive)