Harry Potter Spells

Disarming Charm- Expelliarmus (takes the wand from the opposing person and brings the wand to you.)

Confusion Charm (used for Boggarts)- Riddikulus (In the 3rd book, The Prisoner of Azkaban, Remus Lupin brought the class to face a Boggart that lives in a closet. The Boggart would take form of what they most feared and they had to conquer that fear by thinking of something they didn't fear. Neville was scared of Snape, so the Boggart took Snape's form and then Neville thought of his Grandmother, something he did not fear and then said the charm. The Boggart got confused and then had Snape wearing his Grandmother's clothing. C'mon, don't tell me you don't remember that)

Memory Charm- Obliviate (Takes away your memory. Gilderoy Lockhart used it in the 2nd book, Chamber of Secrets)

Summoning Charm- Accio (Mrs. Weasley wanted the candy from George's pocket, but he wouldn't give it to her. So, she used this charm to bring it out of his pocket to her. Useful, no?)

Levitating Charm- Wingardium Leviosa (levitates things; make things rise)

Dancing Charm- Tarantallegra (I highly doubt this is used to make someone a better dancer, but rather it's used just to make someone dance.)

Fixing Charm- Reparo (fix something that's broken)

Makes Flowers- Orchideous (it makes the flowers come out from the tip of the wand)

Ripping Charm- Diffindo (to rip something like a bag)

Enlargen- Engorgio

Reduce- Reducio (Makes something smaller. Like a counter thing for the Enlargen spell.

Fire- Incendio (Lights a fire; to make a fire in the fireplace.)

Light- Lumos (Appears on tip of wand. Think flashlight for wizards/witches.)

Open Locks- Alohomora

Repel Water- Impervius (Used on Harry's glasses when he was playing Quidditch and it was raining)

See Invisible Ink- Aparecium (Must tap parchment three times. Snape wanted to see what was on the Maurader's Map thinking it was all in invisible ink.)