Well, if you mean the One True God, aka Jesus Christ then a 4 letter word is Lord.
Deity
Thor, Ullr and Loki are all four letter god names.
yahweh
Uranus was the mythological Greek god of the heavens. His name begins with the letter U.
nothing
Nothing is the answer. Nothing is impossible for God, Nothing is above God, If you eat nothing you will die, Nothing is more important than love, and Nothing is the seven letter word.
A four letter word for Wednesday's god is Odin.
...Seven IS a favorite letter in God's alphabet!
nothing
The answer is "nothing".
The supreme god in Roman mythology is Jupiter, preceded by Saturn.
Well, if you mean the One True God, aka Jesus Christ then a 4 letter word is Lord.
Apep
Godly.
dieu
Deity