What is incredible as a noun?

It is not. "Incredible" is an adjective. Abstract nouns are theoretical nouns, ones that aren't corporeal, like "Beauty" or "Charisma." "He has beauty" or "Her beauty is truly amazing."

The noun forms for the adjective incredible are incredibility or incredibleness.

The noun forms for the adjective incredible are incredibleness and incredibility.

The word "you" is a second person pronoun. It is not a noun.

Yes - A noun is a place, thing or a person. A noun is a thing so that counts as a noun.Occasionally, a noun can also be an idea. e.g. "My love was as strong as the willow tree." Yes, i know that's a...