"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Common
It can be, as in a dear person, or dear memories. The word dear can also be used as a noun (a kind or helpful person). It is also rarely used as an adverb (e.g. the principles we hold dear).
It is a proper noun, because it is the name of a specific thing.
proper
That would be a common noun my dear.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Common
It is a proper noun, because it is the name of a specific thing.
proper
It can be, as in a dear person, or dear memories. The word dear can also be used as a noun (a kind or helpful person). It is also rarely used as an adverb (e.g. the principles we hold dear).
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?