A paradox describes a state of affairs that seemingly defies any possible rational explanation in terms what is currently known. An "oxymoron" is a phrase, usually just two words, that is seemingly self-contradictory. Examples: "devout atheist", "honest politician". An oxymoron makes no assertion. It does not confuse you. To describe a paradox requires at least a sentence, and possibly an entire essay. It must contain a genuinely perplexing idea.

oxymoron is a kind of rhetorical method.Paradox is mean contradictory person or thing.