Yes, clue is an abstract noun, a word for evidence or information used in the detection of a crime or solving of a mystery.
A clue is not an object or words, a clue is the information derived from an object or words.
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.
The abstract noun is obligation.
Abstract noun of hopeless
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 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.