[Avenstar]

Morrowind does spells different than other games. The manual list the basic spell types available. Those are all the single spell effects in the game. Merchants sell variations of those basic spells.

For instance, the manual lists the basic spell type Shock Damage. Merchants will sell spells such as Shock, Shockball, and Lightning Storm, which are all variants of that basic spell type, the differences between those 3 variants being range, damage, and duration. Merchants can also sell combination spells. They can be multiple effects of the same spell, or a combination of spells. A merchant might sell a spell called Flameeater that has two basic spell effects, first an effect that raises your fire resistance, and second a spell absorption effect.