Across
- 4. Giant, monster serpent-like creatures
- 5. Percy's sword
- 6. The giant who was born to oppose Ares
- 8. Greek goddess of snow
- 9. The giant born to oppose Poseidon
- 11. Roman deity of the south wind
- 12. The roman goddess of war
- 13. The titan of the east
- 14. The titan of the north
- 17. Hazel's horse
- 18. The island where Calypso is imprisoned
- 20. A creature that has only one eye
Down
- 1. The female spirits of curses
- 2. The river of fire
- 3. A greek mathematician, physicist, engineer, inventor, and astronomer.
- 7. Commander of the roman army
- 8. Two mischievous forest creatures who are brothers
- 10. A creature that has a human upper body and lower body of a goat (greek)
- 15. The augur at Camp Jupiter
- 16. The place where Percy and Annabeth fell
- 19. The river of misery