Sure, you can use "Alien" as a proper noun when referring to a specific extraterrestrial being or a character in a movie like the iconic Alien from the film franchise. Just make sure it's capitalized to show it's a name or title. And no, I'm not talking about your weird neighbor from across the street.
The noun "alien" is a singular, common, concrete noun, a word for a person. The word "alien" is also an adjective.
The word cousin is a common noun, the word Scott is a proper noun. When used to name the person, Cousin Scott, you can use cousin as a proper noun.
Exxon is a proper noun
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.
No
Some people believe in aliens. Alien is a noun so use it in a sentence as a person
The word "alien" is typically a common noun, as it refers to a general concept of a being from another planet or a foreigner. However, it can also be used as a proper noun when it is part of a specific name or title, such as in a work of fiction or a specific entity. Overall, its classification depends on the context in which it is used.
The noun "alien" is a singular, common, concrete noun, a word for a person. The word "alien" is also an adjective.
The word America is a proper noun because it is the name of a specific place. The common nouns for the word America is country or continent, depending on use.
Depends how you use it
The word cousin is a common noun, the word Scott is a proper noun. When used to name the person, Cousin Scott, you can use cousin as a proper noun.
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.
Depending on how you use it general can be a proper or common noun. Example common noun: That man is the general of his fleet. Example proper noun: General Washington was later made president.
You can sometimes us a proper noun in place of a common noun but you would have to change the sentence. You should use a pronoun instead.
Pencil proper or common noun
Exxon is a proper noun
proper noun