Proper noun - Wikipedia
https://en.wikipedia.org/wiki/Proper_nounA proper noun is a noun that identifies a single entity and is used to refer to that entity, such as Africa, Jupiter, Sarah, or Amazon, as distinguished from a common noun, which is a noun that refers to a classof entities (continent, planet, person, corporation) and may be used when referring to instances of a specific class (a continent, another planet, these persons, our corporation). Some proper nouns occur in plural form (optionally or exclusively), and then they refer to groups …
What Is A Proper Noun? | Thesaurus.com
www.thesaurus.com › e › grammarApr 12, 2021 · Proper nouns can also refer to things. It can be tricky to figure out which things in particular are proper nouns. Remember, proper nouns refer to specific, unique things. So, nouns like Jupiter (a specific planet), Friday (a specific day of the week), and Christianity (a specific religion) are proper nouns.