General   (General discussion, talk about anything.)

It's a peculiar thing though with oxymorons, they work.
Some more examples :-

open secret
act naturally
found missing
seriously funny
Microsoft Works
Advanced BASIC
virtual reality
pretty ugly
almost exactly
minor crisis
exact estimate
larger half
clearly confused
alone together
liquid gas
jumbo shrimp
civil engineer
tragic comedy
unbiased opinion
same difference
plastic glasses
definite maybe
original copies
constant variable
even odds
extinct life
genuine imitation
working holiday
living dead