Examples of antonyms are:
1. afraid - valiant
2. ask - retort
3. begin - terminate
4. correct - errorneous
5. friend - antagonist
6. laugh - snivel
7. noisy - tranquil
8. repair - demolish
9. small - gargantuan
10. true - bogus
11. all - none
12. aid - hinder
13. alarm - comfort
14. alone - together
15. capture - release
16. command - obey
17. compliment - insult
18. fiction - fact
19. failure - success
20. continue - interrupt