These are spells used in the HPCS. Some of the spells are also from the previous game, which are listed at teh top.

Flipendo	Previous game spell. Allows Harry to knock weaker opponents, as well as open doors and chests.
Alohomora	Spell to open hidden passageways and locked doors. You have to keep your eyes open because there are plenty of hidden passageways in most of the levels
Lumos	This spell allows Harry's wand to glow, and it also reveals passageways. Can be used only on gargoyle statues.
Rictusempra	This is the first spell taught by Processor Lockhart. It is basically the same effect of flipendo, because it knocks back opponents. The main difference is that it is supposed to be more powerful. It is also one of the spells used in duel.
Diffindo	This is a very useful spell because it allows you to cut vines, webs, and other things blocking your way. Taught by Professor Sprout.
Spongify	Taught by Professor Lockhart, this spell allows Harry to create special substance on the symbol in order to bounce at an extreme height.
Skurge	Taught by Professor Flitwick, this charm allows you to get rid of a sticky green substance called ectoplasm that blocks your path and can lower your health if you touch it.
Expelliarmus	Spell used in wizard duel. It allows Harry to rebound any spell thrown by his opponent.
MimbleWimble	Spell used in wizard duel. It allows Harry to block any spell thrown at him and makes the spell go back to the opponent.