Salvio Hexia

Pronunciation: /ˈsælvi.oʊ ˈhɛksi.ə/ sal-vee-oh hek-see-ə

Description: Provides some form of protection against hexes.

Scourgify (Scouring Charm)

Pronunciation: /ˈskɜrdʒɨfaɪ/ skur-ji-fy

Description: Used to clean something.

Sectumsempra

Pronunciation: /ˌsɛktəmˈsɛmprə/ sek-təm-sem-prə

Description: Violently wounds the target; described as being as though the subject had been "slashed by a sword". Created by Severus Snape.

Serpensortia

Pronunciation: /ˌsɜrpənˈsɔrti.ə/ sur-pən-sor-tee-ə

Description: Conjures a serpent from the spell caster’s wand.

Silencio (Silencing Charm)

Pronunciation: /sɪˈlɛnsi.oʊ/ si-len-see-oh

Description: Silences something immediately.

(Slug-Vomiting Charm)

Description: A jet of green light strikes the victim, who then vomits slugs for an undefined period of time (greater than five hours). The sizes of the vomited slugs decrease with time.

Sonorus

Pronunciation: /sɒˈnɔərəs/ son-nohr-əs

Description: Magnifies the spell caster’s voice, functioning as a magical megaphone

Specialis Revelio (Scarpin's Revelaspell)

Pronunciation: /ˌspɛsiˈælɨs rɛˈvɛli.oʊ/ spes-ee-al-is re-vel-ee-oh

Description: Causes an object to show its hidden secrets or magical properties.

(Stealth Sensoring Spell)

Description: Detects those under magical disguise.

(Stinging Hex, Stinging Jinx)

Description: Produces a stinging sensation in the victim, resulting in angry red welts and occasionally the severe inflammation of the affected area.

Stupefy (Stunning Spell, Stupefying Charm, Stunner)

Pronunciation: /ˈstjuːpɨfaɪ/ stew-pi-fy

Description: Puts the victim in an unconscious state. Manifests as a jet of red light.

(Supersensory Charm)

Description: Able to possess superior senses than before.

(Switching Spell)

Description: Causes two objects to be switched for one another.