The only English option for those letters is sh.
further
reporter, recorder
rottwieler
AnswerRoar is a four letter word that starts with r and ends with r.AnswerI might add, rearAnswerI might add, roarAnswerI will add: ruer and rier
Rotation radiation
hurrah
hairpiecehardcoreheartacheherbicidehindrancehoroscopehorticulturehurricanehydrochloridehyperactive
The only word I could find that uses those letters and ends with H is hippish.
Some four letter words that start with R and end with H are:rashrichrushRuth
Lots!gorhenheroinoriganreaginregainregionargongirongraingroangroinheronhoganorganreignaeonaginagonairnearngaengaingiengirngrangrinhaenhernhornironrainreinroanaineonerngangenginhenhinhonionranrinaneninon
A word that starts with S and ends with X is sphinx.
Czar is a 4 letter word. It begins with C and ends with R.
One example of a long word that starts with "s" and ends with "r" is "supercomputer."
SMILER - There is a mile between the s and the r!
Orgy
or
rondeau