Some four letter nouns that start with E are:
ezra
Elmo
Ambulance starts with a and ends in e. It's a noun with 5 consonants, 4 vowels.
Erin .
eats
game
Ease.
eon, E. Coli, and ester
No river in Hungary starts with the letter E.
An employment letter starts with the letter E. Perhaps an empathy letter to someone who is ill or bereaved.
Eggnog is a drink that starts with the letter E.
ease, edge, Eire, else.