S

St. Brutus's Secure Centre for Incurably Criminal Boys ~ The school that Harry attends, according to Uncle Vernon. [3,2]

St. Mungo's Hospital for Magical Maladies and Injuries ~ Specialist health services. [4,8]

Sanguini ~ A vampire. [6,15]

Scabbers ~ Ron Weasley's rat. [1,6]

Newt Scamander ~ Author of Fantastical Beasts And Where To Find Them. [1,5]

Scourgify ~ A cleaning charm. [5,3]

Rufus Scrimgeour ~ Fudge's successor as Minister of Magic. [6,1]

Secret Keeper ~ One trusted to hold the Fidelius Charm - and have to hold power over information. [3,10]

Sectum Sempra ~ A spell that will cause an enemy to bleed uncontrollably. [6,21]

Seeker ~ In Quidditch, the seeker has to catch the Golden Snitch; this ends the game and scores 150. [1,10]

Serpensortia ~ A charm that throws a snake from the wand toward an opponent. [2,11]

Kingsley Shacklebolt ~ Tall, black wizard; an Auror at the Ministry. [5,3]

Shrieking Shack ~ A noisy hut, possibly the most haunted dwelling in Britain. [3,8]

Shield Charm ~ Creates a temporary, invisible, personal wall of defence - to deflect minor curses. [4,31]

Stan Shunpike ~ Conductor of the popular wizarding conveyance, the Knight Bus. [3,3]

Sickle ~ A silver coin (=29 knuts). [1,5]

Silencio ~ The Silencing Charm. Needs care in wand work - "You don't want to wave it, it's more a sharp jab", explains Hermione Granger. [5,18]

Silver Arrow ~ The broomstick model that Madam Hooch learned on; appearance similar to the Firebolt. [3,13]

Professor Sinistra ~ Head of the Astronomy department. [2,11] Rita Skeeter ~ "Journalist" for the Daily Prophet. [4,10]

Skele-Gro ~ A medicine to help damaged - or missing - bone to regrow. [2,10]

Skiving Snackbox ~ A range of sweets to make you ill, complete with antidotes. [5,6]

The Slug Club ~ Gatherings of Slughorn's favorites; people with connections. [6,7]

Horace Slughorn ~ Came out of retirement to be teacher of potions during Harry's sixth year. [6,4] Slytherin ~ One of the four houses at Hogwarts. Named after Salazar Slytherin, one of the four founders. [1,5] Hepzibah Smith ~ A wealthy witch, with the look of a melting iced cake, employer of Hokey, a house-elf. [6,20]

Zacharias Smith ~ Hufflepuff Quidditch player. [5,16]

Professor Severus Snape ~ Head of Slytherin House, Teacher of potions, with aspirations for the Dark Arts. [1,7] Nicknamed 'Snivellus' while a student, and none too fond of Harry Potter, if the truth be known.

Pocket Sneakoscope ~ Lights up and spins in the presence of an untrustworthy person. [3,1]

Golden Snitch ~ In Quidditch, the smallest ball, about the size of a large walnut, with wings. Very fast, and hard for the Seeker to catch - but ends the game and scores 150. [1,10]

Snuffles ~ Another nickname for Sirius Black [4,27]

Sonorus ~ A charm to magify the voice a hundred-fold. [4,8]

Sorting Hat ~ A patched, frayed and extremely dirty hat, which sorts first years into houses at Hogwarts; a Thinking Cap. [1,7]

Spattergroit ~ A most grievous affliction of the skin, appears similar to freckles. [5,23]

Specialis revelio ~ A revealing charm; exposes previous charms. [6,9]

Spellotape ~ Adhesive Tape used in repairing damaged wands, and other magical challenges. [2,6]

S.P.E.W. ~ Society for the Promotion of Elfish Welfare; set up by Hermione Granger to assist in liberating House Elves.

Sphinx ~ The body of an over-large lion, with the head of a woman - and a rare skill with riddles. [4,31]

Spinner's End ~ Street where Professor Snape lives. [6,2]

Alicia Spinnet ~ Chaser for Gryffindor's Quidditch team. [1,11]

Splinch ~ The separation of random body parts while apparating. [4,6]

Phyllida Spore ~ Author of One Thousand Magical Herbs And Fungi. [1,5]

Professor Pomona Sprout ~ Teacher of Herbology. [1,8]

Squibb ~ Someone born into a wizarding family, but without powers. [2,9]

Stinksap ~ Defensive fluid produced by the Mimbulus mimbletonia plant. [5,10]

Sorcerer's Stone ~ You'll have to read the book!

Stonewall High ~ The comprehensive school that Harry did not go to, despite the Dursleys' plans. [1,3]

Stupefy ~ A stunning spell. [4,9]

Swedish Short-Snout ~Blue-grey dragon, with long pointed horns. [4,19]

Switching Spell ~ Charm to alter some aspect of the target - Dragon's fangs to wine gums, perhaps? [4,15]

Emeric Switch ~ Author of A Beginners' Guide To Transfiguration. [1,5]