Siberian, subboreal, sub-zero, stone-cold or shivery.
The word strict has 6 letters and begins with s.
secure
slander
Sinistral and Levo
sot
Snow job is a synonym for deception. It begins with the letter S.
smart
escapeessayesteemestimateescaroleestimateescrowesquire
Scissors is an 8 letter word. It begins and ends with S.
Likely candidate words are: self-made. sure-fire.
That would be 'catacomb' . Rome is riddled with them.
Stunning is a synonym for beautiful. It begins with S.