Across
- 5. chronological
- 7. crony
- 8. biography
- 11. microbiological
- 12. synchrony
- 14. symbiosis
- 15. biosphere
- 16. chronicle
- 18. anachronism
- 19. autobiography
Down
- 1. anaerobic
- 2. chronic
- 3. synchronize
- 4. aerobic
- 5. chronophobia
- 6. chronology
- 9. amphibian
- 10. biology
- 13. synchronized
- 17. biowaste