rondeau
A word that starts with S and ends with X is sphinx.
SMILER - There is a mile between the s and the r!
rondeau
jar...
One example of a long word that starts with "s" and ends with "r" is "supercomputer."
Czar is a 4 letter word. It begins with C and ends with R.
rotunda
Rota
rutabaga
air
Pincer, picker.
rotator