Also more popularly known as "oxymorons", oxymora should be the correct term for more than one oxymoron.
Oxymora does not have to be physically possible neither logically possible as well.
As long as both words contradicts each other, it's still an oxymoron.
2. Cold Fire
3. Good Garbage
4. Almost Ready
5. Climb Down
6. Tight Baggies
See oxymoron for further explanation of oxymora.