The proper noun 'Cleverland' is the name of several companies or businesses in different countries. The nouns 'company' and 'business' are abstract nouns as a word for an aggregate of people, places, things, activities, and actions; a word for a concept.
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
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
Is undergone an abstract noun
The abstract noun form is tourism.
The abstract noun for the adjective vacant is vacantness. Another abstract noun form is vacancy.
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.