English Words and Expressions by Category: Appearance and Personality. Page 15
sinceresincerity
sinewy
sinister
sissy
skillful
skimp
skinflint
skinhead
skinny
slack
slacker
slattern
sleek
sleepy
slender
slim
sloth
slouch
slowcoach
slowpoke
sluggish
sly
smarmy
smart
smoker
smug
sneaky
sniffy
snob
snobbery
snobby
snook
snooty
snorer
snotty
snout
sobriety
sociable
soggy
solicitous
sombre
sophisticate
soppy
sordid
sorrowful
sot
soulless
Spartan
specious
speechless
spender
spendthrift
spiteful
spitfire
splendid
splenetic
spoilsport
sponger
spontaneous
spotless
sprig
sprightly
spry
spunky
squalid
squirt
staid
stalwart
starlet
staunch
stay-at-home
stayer
steadfast
steady
stick-in-the-mud
stickler
stingy
stocky
stoic
stolid
stoop
story teller
stout
straight hair
strand
strange
stranger
strategist
strenuous
stripling
strong
strong character
strong commitment
strong force
strong-willed
strongest
stroppy
stubborn
studious