When used to mean a group of ranchers, cowboys is a common noun. If used as the name of the football team (Dallas Cowboys), a business (Backcountry Cowboy Outfitters), or a book/movie title (Midnight Cowboy) it is a proper noun.
"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
yes
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.
proper noun
Proper noun
It is a proper noun, because it is the name of a specific thing.
what is trix
it's a common noun. a proper noun would be Spider-Man.