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.

Trivia

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