Salient significant;*conspicuous;*standing*out*from*the*rest
Salutary healthful;*wholesome
Sang-froid calmness;*composure*or*cool*self-possession
Sanguine cheerful;*optimistic
Sapient wise;*full*of*knowledge
Saturnine gloomy;*sluggish
Savant a*person*of*extensive*learning;*an*eminent*scholar
Scintillate to*sparkle;*to*twinkle;*to*sparkle*intellectually
Scurrilous coarsely*abusive;*vulgar
Sedition rebellion*or*resistance*against*the*government
Sedulous hard*working;*diligent
Sentient conscious;*capable*of*feeling*or*perception
Shard a*fragment
Shibboleth a*slogan;*a*password
Sibilant a*hissing*sound
