envelope
post office
Engaging. Evolving.
post office
ebet
Post Office because P,E and millions of mail in it, so a lot of letters
That would be the Post Office.
Eagerest
spore
A post office
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.
Envelope begins and ends with the letter e. It contains one letter.
It could possibly be maize