NO!!!
'Hat' is a concrete common noun, because it is an object you can hold .
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
Is undergone an abstract noun
The abstract noun is criticism.
Abstract noun of hopeless
The abstract noun is obligation.
The noun 'thing' can be an abstract or a concrete noun, depending on what the 'thing' is.Some abstract things are question, answer, idea, hope, love, patience.Some concrete things are house, hamburger, hill, hat, salmon, salt.
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
Hat Happy (abstract) Hair Head Hump THeir are many, search in a dictionary
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.