Oxymorons......

50. Act naturally
49. Found missing
48. Resident alien
47. Advanced BASIC
46. Genuine imitation
45. Airline food
44. Good grief
43. Same difference
42. Almost exactly
41. Government organization
40. Sanitary landfill
39. Alone together
38. Legally drunk
37. Silent scream
36. British fashion
35. Living dead
34. Small crowd
33. Business ethics
32. Soft rock
31. Butt head
30. Military intelligence
29. Software documentation
28. New York culture
27. Extinct life
26. Sweet sorrow
25. Childproof
24. “Now, then…”
23. Synthetic natural gas
22. Christian scientists
21. Passive aggression
20. Taped live
19. Clearly misunderstood
18. Peace force
17. New classic
16. Temporary tax increase
15. French bravery
14. Plastic glasses
13. Terribly pleased
12. Computer security
11. Political science
10. Tight slacks
9. Definite maybe
8. Pretty ugly
7. Twelve-ounce pound cake
6. Diet ice cream
5. Rap music
4. Working holiday
3. Exact estimate
2. Religious tolerance

And the NUMBER ONE top Oxymoron
1. Microsoft Works

H/T DML