No, it’s not, unless you specifically decide to define the words to mean the same thing. A vote is simply a choice between two or more options. Voting for someone is not a way of showing approval of them, it’s a way of saying that given the available options, one of them is preferable to the other, in much the same way that an appendectomy is preferable to dying from appendicitis. Anyone would rather do neither, but when you have appendicitis, neither isn’t an option.