The noun appraisal is the abstract noun, a word for a process.
The abstract noun for absent is absence.
The abstract noun is brevity.The noun is brevity (shortness of duration).
The abstract noun for the adverb gently is gentleness.
Discussion is the abstract noun
Is undergone an abstract noun
The abstract noun is obligation.
The abstract noun form is tourism.
The abstract noun for the adjective quick is quickness.
The abstract noun for the adjective 'close' is closeness.The abstract noun for the verb to 'close' is the gerund, closing.
The noun 'grammar' is a common, uncountable, abstract noun. The noun 'grammar' is functioning as the direct object of the verb 'teaches'.
The abstract noun is supervision.
abstract
The abstract noun form of the adjective 'opinionated' is opinionatedness.The word 'opinionated' is the adjective form of the abstract noun opinion.
The abstract noun form of the adjective 'humble' is humbleness.A related abstract noun is humility.
The abstract noun form for the concrete noun 'mother' is motherhood.There is no abstract noun form for the concrete noun 'shoes'.
There is no abstract noun form of the concrete noun shoes. A close cousin is the abstract noun 'shoelessness'.