What is the term for a word that is an instance of itself?
Some words are examples of the concept they name. Examples:
- "Word" is a word.
- "Noun" is a noun.
- "Eggcorn" is an eggcorn (a mistaken word that sounds like and has some connection to another word) for "acorn."
- "Mondegreen" is a mondegreen; the word comes from mishearing the song line "laid him on the green" as "Lady Mondegreen."
What is the word for words of this kind? One site that I found gives "word that describes itself" as one of the meanings of "autonym," but I can't find any other confirmation of this usage.