Just to pop in ...
Rather that 'God' exists in a class of its own. So the noun God is OK, as long as one is mindful of the categories inferred by the noun.Yeah, yeah! I think I get it: The noun God is accurate, but our definition of a noun is too narrow.
Logically the categories are not exclusive, eg: a person is also thing ...One might say a noun can be a person, place, thing or spirit. Since these are exclusive categories...