Ecstatic and elated are synonyms for happy. They begin with the letter E.
Error is a synonym for not true. It begins with the letter E.
Eternally is a synonym for forever. It begins with the letter e.
excited
Merry is a synonym for happy. It begins with the letter m.
Equal is a synonym for not odd. It begins with the letter e.
Zealous is a word that means the same as happy and starts with a Z.
eligably
encrypted or encryption
Effort is a synonym for task. It begins with E.
Entertaining is a synonym for funny. It begins with the letter e.
exited
Endemic is a word that means local and starts with 'E." It refers to patterns of disease occurrence.