Thesaurus

"Are you the "saurus"?''" "''It's one word, "thesaurus," the thesaurus. Sheesh!"

- D.W. and the thesaurus

The thesaurus is a dinosaur who is very good with words.

He spends most of his time organizing words in the library's reference section, but there are so many that he still has a lot to go. He appears in D.W.'s dream. After testing her worthiness, he told her the perfect name to call Arthur.

There is a chance he is real, as he was seen outside D.W.'s window after she woke up from the dream.

Trivia

 * He is named after a, a book that lists words, similar meaning words, and opposites.