Is there a word for words about words?
Solution 1:
The neologistic nymonym has been used in what I believe is exactly the sense you are seeking, at StartWright.com. It has not yet made it into any dictionaries that I can find, but its meaning is readily derivable: since nym is the root for "word" a nymonym is therefore a "word word", or a word about words.
Solution 2:
You could probably use the term meta when describing it.
http://en.wikipedia.org/wiki/Metalanguage