snatch (weightlifting)
snap (of the wrist; in baseball, golf, etc.)
sneaker; sneakers; trainers
snake
snow
(plastic) toboggan
snowboard; snowboarding
spark
spurt
sparring
spy; spying
spike (on a shoe or tyre); stud; cleat
spice
spiral
spaghetti
leggings (stretchy skin-tight trousers)
Spam (canned luncheon meat)
decisively; decidedly; boldly; once and for all; unreservedly; frankly
span
speaker
speech
speedy
speed
speeding up; speed-up
speedway
spear
spirit
Spirulina (algae)
spin; rotation
spoon
sphinx
split
(coil) spring
sprinkler
sprinter
sprint
spray
spacing
space; room
space shuttle
spare (part, tire, etc.)
Spain
should do; ought to do
spectacle; striking display
spectrum
specialist
special
spelling
spencer jacket
spoke
spokesman
sport; sports
sports car
sportsman
sporty (esp. garments, accessories, etc.)
spot; dot; mark
spotlight
trousers; pants
sponsor
sponge