Granted is a related term of legitimate.
As verbs the difference between granted and legitimate
is that granted
) while legitimate
is to make legitimate, lawful, or valid; especially, to put in the position or state of a legitimate person before the law, by legal means.
As an adverb granted
As a preposition granted
is (used to mark the premise of a syllogistic argument
As an adjective legitimate is
in accordance with the law or established legal forms and requirements; lawful.