phrase requests - Words that define a type of word and also obey that definition

What is a catchy word that means (non-)self-descriptive

There are plenty of names for word sets:

• synonyms: words that have the same meaning


• palindromes: words that read the same forward or backwards


• homonyms: words that have the same spelling and different meaning


• metanyms: words that symbolize other larger concepts

But a certain set of words that define word sets are also in that set. Unfortunately, I can only think of one right now: antonym, which is in fact an antonym to the word synonym.

Do words like this have a name?

Answer

An autologous word is one that describes itself, such as curt, sesquipedalian, recherché, and septisyllabically.

And autologous. :)