Across
- 3. incognito
- 4. stellar
- 6. gyration
- 7. lunar
- 8. capitalism
- 10. amatory
- 12. helios
- 13. tetragon
- 15. democratize
- 17. geology
- 18. octagon
- 20. surplus
- 21. thermos
Down
- 1. contrast
- 2. sonar
- 4. stereotype
- 5. telescope
- 6. decade
- 7. octameter
- 9. hyperbole
- 11. dynamo
- 14. vitamin
- 16. alter ego
- 19. chronic