Across
- 3. A gigantic yellow-and-green serpentlike monster with frills around its neck, reptilian eyes, and huge talons; it spits poison
- 5. A member of a primordial race of giants, each with a single eye in the middle of their forehead
- 8. A nymph who presides over a body of fresh water
- 9. The wolf goddess who finds Roman demigods and leads them to Camp Jupiter
- 11. The Roman god of death and riches; Greek form: Hades
- 12. The Greek goddess of night; one of the ancient, firstborn elemental gods
- 18. The Greek Demigod camp
- 19. A grain spirit
- 20. The Greek earth goddess; mother of Titans, giants, Cyclopes, and other monsters
- 23. Used to ensnare any mythical creature, or anyone with godly parentage
- 27. Ancient gods of the underworld: Dis, Februus, and Mors, the personification of Death
- 29. The Roman goddess of wisdom, poetry, medicine, commerce, weaving, and crafts; patron of ceramic arts; Greek form: Athena
- 30. Five malevolent spirits who plague potters: the smasher, the crasher, the charrer, the destroyer, and crudebake
- 31. The deepest part of the underworld
- 32. A possessing spirit
- 33. A room in a Roman bath with a cold plunge pool
- 36. A sea demon with flippers instead of hands, and a dog’s head
- 38. A Roman military unit
- 40. The Roman Demigod camp
- 41. A mechanical bull created by the god Hephaestus and given to King Aeetes as a gift. It was made of bronze, with silver horns and rubies for eyes.
- 42. An elected Roman magistrate and commander of the army
- 43. The section of the Underworld where those who are blessed by the gods are sent to rest in eternal peace after death
- 44. A tribe of monsters with a eye in there c'est and no head
- 45. An advanced, handheld or light-stand-mounted Roman torsion siege engine/crossbow
- 47. An immortal spirit that can be good, evil, or neutral and sits between gods and mortals in terms of power
- 48. The Roman god of wine and insanity
Down
- 1. The Greek god of wine and insanity
- 2. The god of the Underworld
- 4. A man-eating bird with a beak made of bronze; its feathers are sharp and can be shot at humans
- 6. Eight-foot-tall cannibal giants with heavily tattooed arms
- 7. A race of creatures that is half human, half horse
- 10. Noncitizen troops attached to a Roman legion
- 13. Newest legionnaires
- 14. Tree nymph
- 15. Roman goddess of thieves, cheats, and liars
- 16. A winged creature with the head of an eagle and the body of a lion
- 17. A room in a Roman bath with a hot plunge pool
- 21. An ore mined by Cyclopes and shaped by tempering the metal in Mount Etna and cooling it in the River Lethe. The metal is harmless to mortals but deadly to creatures of the magical world.
- 22. The mythic named Asterion who's half bull and half man
- 24. The immortal centaur who is the activities director at camp Half Blood
- 25. The Greek queen of the Underworld; wife of Hades; daughter of Zeus and Demeter
- 26. The officers’ headquarters
- 28. A winged female creature that snatches things
- 31. Roman god of boundaries
- 34. The section of the Underworld where people who lived neither a good nor a bad life are sent after death
- 35. The embodiment of Nico's emotions
- 37. A vampire demon with one bronze leg and one donkey leg
- 39. King of Phrygia, son of Zeus; the most notorious criminal from the Fields of Punishment, who’d tried to serve the gods a stew made from his own son. For that, he was sentenced to be forever hungry and thirsty, unable to grasp any food or drink.
- 46. A member of a legion