Dictionopolis, ruled by King Azaz, was the primary destination, in the novel, until The Which's story of the Princesses of Rhyme and Reason. Dictionoplis formerly had a strict rivalry with Digitopolis, until the rescue of Rhyme and Reason and is possibly ongoing after Milo's departure in the novel. Dictionopolis is also the primary, if not only place where people sell letters and words via The Word Market. Letters and words are eatible in the Lands Beyond, having thier respective flavorings (ex: An A would taste like fruit.) This area's respective chapter is very important for Milo’s journey throughout the book and movie, as it is the chapter where Milo learned about Rhyme and Reason.
With Milo escaping the Doldrums, and making a new friend along the way, they finally reached the city of Dictionopolis, the first major city they came apon. They were greeted by a guard, who ask for thier reason of entry. After Milo and Tock stating that they didn't have one, the guard said if they didn't have reason, they needed an excuse. The guard was nice enough to offer them an excuse of thier own, and they managed to get in. When they entered the city, they were met by the King's Advisors, who if one of them said one thing, the others would repeat another word with the same or a simular meaning. They were also able to recite a word's multiple meanings. After this confusing experience, they went to the Word Market. They saw several shops, but sence Milo nor Tock didn't have any money with them, they wouldn't be able to buy anything.