- sunrise
- suo motu
- sunset
- southwestern toad
- Scaphiopus multiplicatus
- Scaphiopus bombifrons
- southern spadefoot
- Scaphiopus hammondii
- steak au poivre
- security director
- semiformal
- shah jahan
- spirit of competition
- sovereign immunity
- superposition principle
- spic
- seneca lake
- second council of lyons
- Sonoran lyre snake
- suppresser
- suppressor
- shut ears to
- smew
- snap fingers
- sprag
- spraemia
- seanad eireann
- syntactically
- synthesise
- synthesism
- syntactical difference
- synthetic thinking
- synthetism
- synthetically
- syphon from
- syphon into
- syphon off
- syracuse
- syphon out of
- syphon out
- syrian desert
- sweltering
- sweltry
- swift fast_moving
- swift as an arrow
- swift_footed
- swifter
- swift moving
- swimming event
- swiss canton