Yes, an abstract noun is a noun, a word that functions as the subject of a sentence or a clause, and as the object of a verb or a preposition.
Examples:
My education is an important part of my life. (subject of the sentence)
My education is an important part of my life. (direct object of the verb 'is')
My education is an important part of my life. (object of the preposition 'of')
The direction that my life takes will depend on my education. (subject of the relative clause)
It can be an adjective, a noun, or a verb. It is most often an adjective, as in such phrases as, "abstract art", "abstract philosophy", and "abstract noun", but it also has at least two meanings as a noun: An example of abstract art and a short summary of a longer writing.
It can also be an active transitive verb, meaning to remove something from a larger entity, as in, "A free radical can abstract a hydrogen atom from a hydrocarbon, thereby converting the original hydrocarbon into another free radical."
The word abstract is a noun as in a summary.
It can also be an adjective and a verb.
No written is a verb. It is the past participle of write.
Boredom in a noun
"Resistance" is a noun of the abstract type.
"Technique" is a noun of the abstract type.
Beauty is an abstract noun.
It is an(n abstract) noun.
abstract noun
It is an abstract noun.
It is an abstract noun.
It is an abstract noun.
Noun. It is an abstract noun.
A noun of the abstract type.
It is an abstract noun.
A noun of the abstract type.
A noun, of the abstract type.
Accuracy is an abstract noun.
A noun of the abstract type.
Contempt is an abstract noun.