Yes, the noun 'marvel' is a singular, common, abstract noun; a word for something that evokes surprise, admiration, or wonder; a word for a concept. Example:
The Grand Canyon is a marvel. (The 'Canyon' is a concrete noun, a physical place, but that it is a marvel is an opinion, an idea, knowledge about its nature.)
The word 'marvel' is also a verb.
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.
Yes, the noun 'marvel' is an abstract noun, a word for something that arouses wonder, admiration, or astonishment; a word for a concept.
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.
The noun childhood is a singular, common, abstract, compound noun; a word for the time of being a child.