No, the word 'disappeared' is not a noun; the word 'disappeared' is the past participle, past tense of the verb to disappear.
The abstract noun form for the verb to disappear is disappearance, a word for the process of something ceasing to exist or be in use; a word for a situation where someone or something can't be found; a word for a concept.
The noun appraisal is the abstract noun, a word for a process.
Absence is the abstract noun for absent.
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
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.
The abstract noun for the adjective quick is quickness.