- sell someone down the river
- snot
- self-evident
- synodical
- selective
- seldom
- seer
- sidereal day
- see to
- stationary
- static
- state-of-the-art
- single-pointed
- stygian
- startling
- startle
- start
- stand-off
- standard
- sand ridges
- stand up
- stand out
- stand by
- stand
- severest
- stake
- staid
- stadium
- stab someone
- show window
- squirt
- squire
- stupor
- spy
- spruce
- spring
- spree
- spread
- spouse
- suer
- spotty
- spotted
- spotless
- spray
- sporadic
- sponger
- split
- splice
- strumpet
- splash
- spite
- spit
- spirited
- spirit someone, spirit something
- spine-chilling
- self-abuse
- spill the beans
- spick and span
- spent
- spend
- sarco
- spell
- spell
- speed
- spectator
- specialist
- speak out
- speak for
- sparse
- sparkling
- spark
- sparing
- space
- souse
- sound
- sider
- sound
- shellshock
- sound
- sortie
- so-so
- sort of
- sequin
- sorrow
- state
- soothe
- sooner
- song and dance
- song
- somewhat
- soliloquy
- solidify
- soldier on
- somehow
- sea-serpent
- someday
- solace
- soften
- society
- sardonically