Abstract noun.
No, "kindness" is not a proper noun; it is a common noun that refers to the quality of being friendly, generous, and considerate. Proper nouns, on the other hand, name specific people, places, or organizations, such as "John" or "Paris." Since "kindness" does not refer to a unique entity but rather a general concept, it remains a common noun.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
It is a proper noun, because it is the name of a specific thing.
Yes, the noun 'kindness' is a common noun, a general word for the quality or state of being gentle and considerate; a word for any kindness of any kind.
proper
Proper noun
Pencil proper or common noun
it's a common noun. a proper noun would be Spider-Man.
Proper noun or common noun
The noun cassette is a common noun.
a common noun?