What is the difference between oxymoron and paradox?

A paradox is, in essence, a phrase that contradicts itself and in the end can't be solved.

eg. What would happen if pinnoccio said, "I'm lying"?

if he was lying then his statement (I'm lying) would be true

if he was telling the truth then his statement would instead be false.

eg2 Don't go near the water until you've learned to swim.

this would mean the person could never go near water, because the only way to learn to swim is to get in, but you cant because you dont know how to swim.

An oxymoron is a statement that contains 2 neighbouring contradictory Words

eg. awfully good

act naturally

open secret

seriously funny

alone together