I don't think it is. What you might call "absolute freedom" in a social context is licence. It doesn't work in a social context.
In a natural state, that is without a social context, freedom isn't absolute either. Humans are limited by our physicality and circumstances.
So absolute freedom probably doesn't exist.
As for natural rights. I'm with Bentham - "nonsense upon stilts."
I think that our freedom is limited by more than just our physical capabilities, even in a natural state. I should say, our defensible freedom is limited as such. But this kind of freedom is where our natural rights come from and that's why I argue it is the natural freedom that we are afforded as human beings.
Let me offer an illustration. Even in the state of nature, if you go around violating others' rights then they eventually form into groups to protect themselves and make sure that you can't do that anymore. This naturally leads to a situation where everyone has an equal amount of liberty and thus no one can deprive any other of any portion of their liberty. Eventually you have groups of people violating other groups of people, but you could see that scenario as a larger scale version of the case of individuals. No matter what there is always a ceiling of anarchy on top of the highest stratum of government. That anarchic layer is where one can be absolutely free. We humans have not lived in that layer since before tribal times and before people began cooperating and communicating, even in the most rudimentary sense.