Across
- 4. insight, shrewdness
- 7. galactic nucleus, celestial object
- 8. censor, expurgate
- 9. apathetic, indifferent
- 11. aristocrat, noble
- 12. illiteracy, gibberish
- 15. known, identified
- 16. authenticate, certify
- 18. humble, modest
- 19. sincerity, literalness
- 20. carbon fixation, chlorophyll process
Down
- 1. expedite, advance
- 2. blood protein, oxygen carrier
- 3. sanitize, purify
- 5. empower, emancipate
- 6. static, unchanging temperature
- 10. whole, entirety
- 13. sail around, orbit
- 14. suffocation, asphyxiation
- 17. corrode, rust