Act naturally
Found missing
Resident alien
Advanced BASIC
Genuine imitation
Airline food
Good grief
Same difference
Almost exactly
Government organisation
Sanitary landfill
Alone together
Legally drunk
Silent scream
British fashion
Living dead
Small crowd
Business ethics
Soft rock
Butt head
Military intelligence
Software documentation
New York culture
Extinct life
Sweet sorrow
Childproof
"Now, then..."
Synthetic natural gas
Christian scientists
Passive aggression
Taped live
Clearly misunderstood
Peace force
New classic
Temporary tax increase
French bravery
Plastic glasses
Terribly pleased
Computer security
Political science
Tight slacks
Definite maybe
Pretty ugly
Twelve-ounce pound cake
Diet ice cream
Rap music
Working vacation
Exact estimate
Religious tolerance

And the NUMBER ONE top Oxymoron:
Microsoft Works