No, the noun 'redness' is a concrete noun, a word for something that can be seen.
You could say redness.
The abstract noun for red is "redness." It refers to the quality or state of being red.
Redness
No, the noun 'red' is a concrete noun, a word for something that can be seen, a word for a physical thing.
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.
The abstract noun is obligation.
Abstract noun of hopeless
Friendship has not abstract noun because It is a abstract noun