The object of the edsa revolution that begins with letter f and ends with m is freedom.
Freddy
A word that begins and ends with E and has only 1 letter in between is EYE. Begins and ends with E and the Y is in between.
holy
alimony
attentively
EarlyEbonyEdifyElegyEmeryEmptyEntryEnvoyEssayEvery
Leroy
If the question means 'one other letter', I believe the answer is eye. (Adds one letter Y.) If the question is a riddle, the answer is 'envelope' as it begins and ends with 'e', and it contains a letter.
Gravy is a food. It begins with G and ends with Y.
sturdy
Yogic is a word. It begins with y and ends with c.