It sounds like an oxymoron.

We believe that the two words moderate and Taliban are incompatible an oxymoron.

A brand new way to put buildings together, something called mass customization. No, it is not an oxymoron.

I got a split reaction to that during the live performance, because there is some people who understand live subtitles are a kind of an oxymoron, because usually there is someone making them afterwards.

Pakistan is hit hard by a wave of monstrous Taleban attacks, and in Afghanistan NATO troops die and are terribly injured in large numbers. The Peace Process in the Middle East becomes ever more clearly the great oxymoron in international relations.