Oxymorons... 

47. Act naturally 
46. Found missing 
45. Resident alien 
44. Advanced BASIC 
43. Genuine imitation 
42. Airline Food 
41. Good grief 
40. Same difference 
39. Almost exactly 
38. Government organization 
37. Sanitary landfill 
36. Alone together 
35. Legally drunk 
34. Silent scream 
33. American history 
32. Living dead 
31. Small crowd 
30. Business ethics 
29. Soft rock 
28. Butt Head 
27. Military Intelligence 
26. Software documentation 
25. New York culture 
24. New classic 
23. Sweet sorrow 
22. Childproof 
21. "Now, then ..." 
20. Synthetic natural gas 
19. Passive aggression 
18. Taped live 
17. Clearly misunderstood 
16. Peace force 
15. Extinct Life 
14. Temporary tax increase 
13. Computer jock 
12. Plastic glasses 
11. Terribly pleased 
10. Computer security 
09. Political science 
08. Tight slacks 
07. Definite maybe 
06. Pretty ugly 
05. Twelve-ounce pound cake 
04. Diet ice cream 
03. Working vacation 
02. Exact estimate 
And the Number one top OXY-Moron 
01. Microsoft Works