Question

Is it God or god?

Answer 1

It depends what you mean.

Explanation:

"God" would describe a godlike being that you, or in respect for others who believe in, would refer.

"god" does not show the same level of respect or identification.

Answer 2

God

Explanation:

My teacher counts god as a grammatical mistake.

Answer 3

In religions that use the word God to name the supreme being, the noun God is capitalized. It is a proper noun as the name of this being.

Explanation:

Any other use of the word god is a common noun, a general word for any type of god. A common noun is capitalized only when it's the first word in a sentence.

Examples:
"I am the Lord your God... You shall have no other gods before me."
In ancient Rome, Neptune was the god of the sea.
Who is considered a god in the world of chess?
The many gods of ancient Egypt each had their own role.