hotness
The abstract noun for the adjective hot is hotness.
There is no abstract noun form for the concrete noun cold or the adjective cold. An abstract noun is a word for something that can't be seen, heard, smelled, tasted, or touched. The cold can be physically felt. The noun form for the adjective cold is coldness, which can also be physically felt.
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.
Abstract noun of hopeless
The abstract noun is obligation.
Friendship has not abstract noun because It is a abstract noun
The abstract noun form is tourism.
The abstract noun for the adjective vacant is vacantness. Another abstract noun form is vacancy.