Adjectives are words that describe things.
Some adjectives can describe
words, such as adjectives.
Some adjectives can describe themselves. These are self-descriptive adjectives.
Some well known/suggested-by-other-noders self-descriptive adjectives:
I've only come up with these so far:
There is a
word, an adjective in fact, which describes self-descriptive adjectives. They are
autological. There is another word that describes non-self-descriptive adjectives (all other adjectives). They are
heterological.
A version of Russell's Paradox, called Grelling's Paradox, or sometimes, the Heterological Paradox, can be stated simply: Is "heterological" heterological?