What's another word for thesaurus?

I thought for sure my thought for the day would stump the universe but it turns out the thesaurus does have other words for itself.

Probably because it's a 'Super Thesaurus' with special word-suggesting powers. Unless you look up 'kryponite,' which case it starts throwing up and curls into a fetal position.

Here's what Roget's Super Thesaurus suggests for alternatives to its own bad self:

lexicon, word treasury, synonym finder, word book.

OK, Super Thesaurus, I'll give you 'lexicon.'

But 'word treasury'? Little uppity, don't you think?

'Synonym finder' sounds like something a well-spoken caveman would say, with a firm grasp on fancy parts of the lexicon and very cavemannish understanding otherwise. Pretty sure if you know the word synonym you can do better than 'finder.' Howzabout 'synonymizer'?

'Word book' just . . . no. That's what a caveman says when you ask what he got at the library.