- sporting
- sports gear
- sportscast
- sportsmanship
- sprocket feed
- sprout
- sprug
- spry
- spunk
- spurious
- spurt
- sputation
- squabble
- squabbler
- squalid
- squall
- squally
- squalor
- squander
- square
- square built
- square frame
- square holes
- square root
- square-toes
- squash
- squashiness
- stack yard
- staddle
- staff
- stage-effect
- stage-play
- stagflation
- stagger
- stagnancy
- stagnant
- stagnate
- stain
- stainlessness
- stair head
- stake
- stake something out
- stalagmite
- stale
- stalemate
- stalk
- stately
- statement
- statement of allegations
- stateside
- statesmen
- station
- station of the cross
- stationery
- statue
- statuesque
- stature
- status
- status symbol
- statute
- staunch
- stauncher
- staunchest
- stave in
- stave something in
- stave something off
- stay for
- stay one's hand
- staycation
- stele
- stemless
- stemware
- stench
- stencil
- steno
- stenographer
- stenography
- stenotype
- stentorian
- step in
- step motherly attitude
- step on it
- step sister
- step something up
- step-child, step-son, step-daughter
- step-mother
- stepney
- stepping stone
- stepson
- stereo chemistry
- stereoscopy
- stereotype
- sterilization
- sterling
- sternum
- sternutation
- steroid
- stet
- stethoscopic
- stew