- Somber
- Somberly
- Sombre
- Sombrero
- Some
- Some way or other
- Somebody
- Someday
- Somehow
- Someplace
- Something is up
- Sometime
- Sonology
- Somewhere about
- Somnambulism
- Somnolence
- Somnolent
- Son and heir
- Son et lumiere
- Son of lamak
- Sonar
- Sonata
- Sonatina
- Song
- Song and dance
- Songless
- Soon
- Sop
- Sophisticate
- Sophistication
- Sophomoric
- Soprano
- Sorcerer
- Sore loser
- Sore throat
- Sore-throated
- Sorrel
- Sorrow
- Sorrowfulness
- Sorter
- Soteriological
- Sottish
- Sottishly
- Sottishness
- Sotto
- Sotto voice
- Sought after
- Soul kiss
- Soul-destroying
- Soulfully
- Soullessly
- Sound barrier
- Sound board
- Sound card
- Sound good
- Sound off
- Sound-wave
- Sounding-lead
- Sounding-rod
- Soundly
- Soundness
- Soup
- Sour
- Sour fruit
- Sour sauce
- Source
- Source data
- Sourness
- South
- South-easter
- Southpaw
- Souvenir
- Spaced out
- Spacetime
- Spacial
- Spacing
- Spall
- Spallation
- Spalpeen
- Spam
- Span-new
- Spangle
- Spare diet
- Sparely
- Spark of fire
- Spermic
- Spark plug
- Sparklet
- Sparkling
- Sparklingly
- Sparky
- Sparring partner
- Sparseness
- Spartan
- Spasmodic
- Spathe
- Spatially
- Spatula
- Speak ill of
- Speak volumes