stout
"Story" is a synonym that starts with "s" for news.
Starved and starving. Starved and Starving are Synonyms... antonym for hungry that starts with "s" would be Satisfied.
Slick or Sly - as given by the dictionnary of Synonyms
Some synonyms for the verb reject that start with S are shun or spurn.
a fat man
Satisfactory, satisfying and superb are synonyms for good. They begin with the letter s.
intolerable
boy
discourse
The synonym is "saying" - the meaning of "saw" is an old proverb or truism. Other synonyms might be shibboleth or slogan.
body fat percentage
decompose.