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Scarpin's Revelaspell
Specialis Revelio
spe-see-OH-lihs re-VEL-ee-o
Usually successfully finds the key secrets of the subject.

Scouring Charm
Scourgify
SKUR-jih-fi
Cleans the subject.

Sectumsempra
sek-tum-SEM-pruh
Nonverbal
Cuts a gash/gashes in the subject's face. If cast on someone, dittany should be used immediately.

Serepensortia
sur-pen-SOR-shuh
Causes a serpent to burst forth from the caster's wand.

Severing Charm
Diffindo
dih-FIHN-do
Cuts the subject cleanly.

Shield Charm
Protego
pro-TE'-go
Creates an invisible barrier that shields the caster from most curses and hexes thrown at him/her.

Shock Spell
Shocks the subject with electric power. Is often used to treat insane witches or wizards.

Silencing Charm
Silencio
si-LEN-see-o
Silences the subject.

Snitch Jinx
Causes the subject/s to break out in pimples that spell "SNEAK" across the face. It can be cast upon such things as a piece of parchment, so that whoever signs it will recieve the unpleasant effects of the jinx if he/she breaks the promise made by signing.

Sonorus
so-NOR-us
Amplifies the caster's voice like a Muggle microphone.
Reverse:
Quietus
Puts the caster's voice back to its normal volume after Sonorus.

Sponge-Knees Curse
Makes the subject's knees spongy, making it difficult to walk.

Stinging Hex
Gives the subject a stinging pain.

Stunner/Stunning Spell/Stupefying Charm
Stupefy
STOO-puh-fi
With a bolt of red light, stuns the subject, turns him/her unconcious.

Summoning Charm
Accio
OH-see-o
Summons an object to the caster almost immediately. The Summoning Charm is usually followed by the title of the object that is to be summoned.