The book lists the elements as being Fire, Ice, Lightning, Water, Earth, Wind, Gravity, Poison (that's an element?), and Holy.
On the game however only Fire, Ice, Lightning, Earth, Gravity, Poison, and Holy have there own Materias (in the context "Holy" refers to "Cure") Why weren't Wind and Water included? I realize there are attacks used by enemies (one of them as an Enemy Skill) and Summons that are water and wind, but no magic on their own...