Guide to icons

sacked, sacking
Salamander
Salem Witches' Institute
Sardinia
Saucy Tricks for Tricky Sorts
Scabbers
scales for weighing potion ingredients
Scamander, Newton "Newt"
Scamander, Portentina
scarab beetles
"Scarhead"
schedules
Schmidt, Bruno
Schmidt (father)
school owls
school song
school year
scientific instruments
Scintillating Solution
Scops owl
Scotland
Scouring Charm
Screaming Yo-Yos
Screech owl
Scribbulus Everchanging Inks
scurvy cur
Sea Serpent
Search
Second, dueling
second cousin, Bertha Jorkins'
Second Floor
second hand robe shop
secret doors
secret passageway
Section 13 of the International Confederation of Warlock's Statute of Secrecy
Seeker
self-shuffling playing cards
Self-Stirring Cauldrons
Self-Straightening Brush
Serpensortia
Seven-lock Trunk
Seventh Floor
Severing Charm
sherbet balls
sherbet lemon
sherry
Shield Charm
Shooting Star
Shrake
Shrieking Shack
Shrinking Solution
shrivelfig, Abyssinian
Shunpike, Stan
Shuntbumps
Sickle
Silencing Charm
Silver Arrow
silver unicorn horns
Singing Valentine
Sinistra, Prof.
Sites of Historical Sorcery
Sixth Floor
Skeeter, Rita
Skele-Gro
Skrewts
slang expressions
Sleekeasy's Hair Potion
Sleeping Draft/Draught/Potion
Sloth Grip Roll
Slug & Jiggers Apothecary
Slug Curse
Slytherin
Slytherin dungeon common room
Slytherin, Salazar
Smeltings School
Smeltings stick
Smethley, Veronica
Smethwyk, Elliot
smoking (a long pipe)
snails
snake fangs
snakes
Snape, Severus
Snape’s second chance
Snape's office and private stores
snarled claws
Sneakoscope
Snidget
Snitch (or Golden Snitch)
Snowy owl
Snuffles
Society for the Promotion of Elfish Welfare
socks
Socks and wristwatches
song and dance routine (spider)
Sonnets of a Sorcerer
Sonorus
Sorcerer
Sorcerer's Stone
Sorting ceremony
Sorting Hat
Sorting Hat's Songs (1991: SS7, 1994: GF12)
souvenirs at the Quidditch World Cup
Special Award for Services to the School
spectacles
Spellotape
Spells and Charms: The Nature of Magic
Spells, Encyclopedia of
S.P.E.W.
Sphinx
Sphinx's riddle 
spiders
Spinnet, Alicia
Spirit Division
splinched
Spore, Phyllida
Spotted Dick
Sprout, Professor
Squib
squid, giant
St. Brutus's Secure Center for Incurably Criminal Boys
St. Mungo's Hospital for Magical Maladies and Injuries
St. Valentine's Day
staff room
staircases
Stalk, Blenheim
Standard Book of Spells, The
Starfish and Stick
stationery store
steak and kidney Pie
Stebbins
Stichstock
Stink Pellets
stoat
stoat sandwiches
Stoatshead Hill
Stonewall High
Streeler
Strictly British
strings of fangs
students, Hogwarts
Students' Store Cupboard
Study of Ancient Runes
Study of Recent Developments in Wizardry, A
Stunner
Stupefy
sugar quills
sugar tongs
"summat"
Summers
Summoning Charm
supplies and equipment
Supreme Mugwump
sweater
Sweden
Swedish Short-Snout
Swelling Solution
Swiftstick
Switch, Emeric
Switching Spells
Swivenhodge
Swords, knives, and weapons