Spirit
The concrete noun sole is a physical thing, the bottom of a foot, the bottom of a shoe, and the bottom surface of many other physical objects. The noun form for the verb to sole (the act of putting a sole on something) is the gerund soling, perhaps an abstract noun.
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.