What's the difference between khalwa and 'uzla in islam

I have come to know there are reports about prophet (S.A.W) isolating himself for worship. Is this isolation regarded as *khawla* as defined or does it have any other interpretations in Islam and *'uzla* is also understood as a kind of isolation for worship, so are they both in the same context or if different, what are the main differences?. Mostly I find these two terms in Sufi literature but haven't come across a definition related to authentic Islamic tradition.