"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Pencil proper or common noun
Exxon is a proper noun
proper noun
Later is not a noun. It is an adverb, as in "I'll see you later," where it describes when the action of seeing will happen.
Yes, the word 'Ali' is a proper noun, the name of a person.A proper noun is the name or title of a specific person, place, or thing.A proper noun is always capitalized.
The word "moment" is a common noun.
proper noun
Proper noun
It is a proper noun, because it is the name of a specific thing.
Proper noun or common noun
it's a common noun. a proper noun would be Spider-Man.