No, the word 'who' is not a noun, the word 'who' is a pronoun.
A noun is a word for a person, a place, or a thing.
A pronoun is a word that takes the place of a noun in a sentence.
The pronoun who is a:
Examples:
Is cheer an abstract noun or a concrete noun??????
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
Is undergone an abstract noun
Concrete noun
The abstract noun is criticism.
The noun 'hopefulness' is an abstract noun, a word for an emotion.
Friendship has not abstract noun because It is a abstract noun
The abstract noun is obligation.
Abstract noun of hopeless
The abstract noun form is tourism.
The abstract noun for the adjective quick is quickness.
The noun childhood is a singular, common, abstract, compound noun; a word for the time of being a child.