Atheist
A Deist.
The word that describes God as all loving and kind is "benevolent."
The correct word for a person who doesn't believe in God is, precisely, "atheist".A somewhat related word is "agnostic". However, an agnostic is not necessarily one who doesn't believe in God; rather, it refers to the belief that the existence of God - or other, related, religious topics - cannot be proven or disproven.
There is unbelief based on a lack of knowledge; there are those who haven't heard the Word, therefore they don't believe. If you don't know something how are you going to believe it? Faith cometh by hearing and hearing by the Word of God. (Romans 10:17) Next there is unbelief in which a person is not persuaded to act. A person that knows the truth but choose not to believe it. When we don't believe, God sees it as disobedience. It's important to God that we believe His Word. Many people today are slow to believe God. They are not easily persuaded. Then there are those who believe on the surface, but not in their hearts.
Satan
Deism
omnibenevolent
An atheist.
You may be looking for the term "athiest." An athiest is a person who doesn't believe in God. Various religions believe in God, but not necessarily that Jesus was God incarnate.
It means they believe in a single God.
A person who does not believe in god is called a "Athiest"
christens believe in the trinity. God the father, God the son, and God the Holy Spirit. not to be mistaken, they believe they are all one person.