- shuttle
- shy
- shyness
- sicken
- slanting
- side by side
- sideline
- side-splitting
- sift
- signal
- sigh
- set one's sights
- sightseer
- sign on, sign up
- sign someone on, sign someone up
- significant
- silence
- silent
- silt
- similar
- similitude
- simper
- simple
- simplicity
- simplify
- simplistic
- simply
- simulate
- sin
- sincere
- sincerely
- sinful
- single
- singularity
- singly
- sink in
- sinless
- sinner
- sissy
- sit in
- sit in
- size
- size someone up, size something up
- sketchily
- skin-deep
- skill
- skimp
- skirmish
- skit
- skulduggery
- slab
- slack off
- sexual act
- slang
- shemale
- signeted
- slapdash
- slash
- slaughter
- slaver
- slavish
- slay
- sleep
- sleepless
- sleight of hand
- slip
- slide
- slight
- slighting
- slime
- slip away
- slip
- slip-up
- slog
- slop
- slop around, slop about
- sluggish
- smack
- smack
- smack of
- small
- small change
- small-time
- smarmy
- smashing
- smile
- smoky
- smooth
- smooth-talking
- smoothly
- smoulder
- steer
- smug
- smutty
- snag
- snap
- snap out of
- snarl
- snarl
- snatch