Some four letter words starting with S and ending with F are:selfserfsurf
amok
Nonexistant
lime !
There are no English words that meet the criteria.
Afghanistan and Azerbaijan.
Anna
Some four letter words starting with S and ending with F are:selfserfsurf
amok
Mump.
inch
jazz
Alae
Avid
Quea! Probly
June
buzzzz:)