As far as I know yeah, and that would be elephant.
E
An envelope
Envelope
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.
eye envelope
Envelope
Only the letter E begins with E.All the other 25 letters start with their own letters. They are of course ABCD_FGHIJKLMNOPQRSTUVWXYZ.Notice E is missing because the letter E begins with E.Therefore in conclusion only One Letter exists (on the planet we know as Earth ) in the English language that begins with the letter E!
Envelope begins and ends with the letter e. It contains one letter.
Elkhart County is a county in Indiana. It begins with the letter E.
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.
An envelope.
Equestrian.