50 Antonym Pairs:
General:
1. Good - Bad
2. Happy - Sad
3. Hot - Cold
4. Big - Small
5. Light - Heavy
6. Fast - Slow
7. Strong - Weak
8. Up - Down
9. Left - Right
10. In - Out
11. Open - Closed
12. Start - Stop
13. Push - Pull
14. Above - Below
15. Near - Far
16. Clean - Dirty
17. New - Old
18. True - False
19. Wet - Dry
20. Smooth - Rough
More Specific:
21. Love - Hate
22. Friend - Enemy
23. Success - Failure
24. Hope - Despair
25. Peace - War
26. Brave - Cowardly
27. Kind - Cruel
28. Honest - Dishonest
29. Generous - Stingy
30. Clever - Stupid
31. Wise - Foolish
32. Careful - Careless
33. Active - Passive
34. Positive - Negative
35. Agree - Disagree
36. Accept - Reject
37. Gain - Lose
38. Build - Destroy
39. Give - Take
40. Help - Hurt
41. Protect - Destroy
42. Increase - Decrease
43. Appear - Disappear
44. Rise - Fall
45. Advance - Retreat
46. Approve - Disapprove
47. Expand - Contract
48. Include - Exclude
49. Gather - Scatter
50. Combine - Separate