The noun 'attempt' is a common noun, a general word for an effort or a try; a general word for an attack; a word for any attempt of any kind.
A proper noun is the name or title of a specific person, place, or thing; for example, Attempt IT Solutions, Inc. in Southfield, MI or
"Brave in the Attempt: A Special Olympics Story" a 2004 documentary film.
The word 'attempt' is also a verb: attempt, attempts, attempting, attempted.
proper
As a name of a road , Park Avenue', it is a proper noun, and both words star with a capital letter. However, when used separately, as 'the park, or 'the avenue', they are common nouns and so not need a capital letter.
common
common and proper
It is a proper noun, because it is the name of a specific thing.
common
it's a common noun. a proper noun would be Spider-Man.
Proper
Pencil proper or common noun
It's a common noun as it's a general name for a thing. There's nothing special or particular about it.
Tank is a common noun. Proper nouns are the unique names of people, places, or things. Common nouns are the words for general things. If a common noun is part of a name, it becomes a proper noun. Pronouns always replace proper and common nouns.
Proper noun