Across
- 6. democracy
- 7. hyperactive
- 8. heliograph
- 10. electroscope
- 11. geography
- 13. amorous
- 16. octagon
- 20. stereoscope
- 22. tribalism
- 23. thermotropic
- 24. gyroscope
- 25. vital
Down
- 1. interstellar
- 2. surcharge
- 3. sonar
- 4. tetracycline
- 5. odameter
- 9. dynamic
- 12. contraband
- 14. alteration
- 15. decaliter
- 17. astronomy
- 18. synchranize
- 19. lunatic
- 21. incognito