Sentence examples for a noun from inspiring English sources

The phrase "a noun" is correct and usable in written English.
It can be used when discussing parts of speech or grammar, specifically referring to a word that represents a person, place, thing, or idea.
Example: "In the sentence 'The cat sat on the mat,' the word 'cat' is a noun."
Alternatives: "a naming word" or "a person, place, or thing".