No, the word 'appear' is not a noun.
The word 'appear' is a verb meaning:
The noun forms of the verb to appear are appearance and the gerund, appearing.
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
Is undergone an abstract noun
The abstract noun is criticism.
The abstract noun is obligation.
Abstract noun of hopeless
The word appear is a verb not a noun. The abstract noun form is appearance.
The abstract noun forms for the verb to appear are appearance and the gerund, appearing.
Appearance
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.