I'm not hung up on the terminology, just on the principle of self-ownership, responsibility, and voluntary interactions.
I consider libertarian, Voluntaryist, anarchist, and abolitionist to mean the same thing, with only slightly different (to some people) connotations.

I once dabbled with "classical liberal" but was not able to go along with that philosophy's acceptance of external governance/The State. I don't care how you dress it up or claim "consent of the governed", it's not for me.