Which kingdom is not one of the seven main kingdoms in westeros? ?

Assuming that you're referring to the game of Throne, the one that is not one of the seven main kingdoms of westeros were : Principality of Dorne
Even though Dorne has a strong influence throughout the land, it was a state that is ruled by a prince, which technically couldn't be called as a kingdom

The differences between them is that Christianity believes in the Trinity, that there are three pieces of Heaven, where Islam and Judaism consider that there is only one god. ANother difference between them is that Judaism lays greater emphasis on rules and fully adheres to them than Christianity, which is more about compassion and approval.

Explanation:

Hope this helps!