The title character of the Dr. Seuss book 'The Lorax' is a five-letter word, LORAX. The Lorax is a small orange creature who speaks for the trees and is an advocate for environmental protection. He is a wise and caring character who warns the people of the town of the dangers of cutting down all the trees. The Lorax is a beloved character in the Dr. Seuss universe and has been featured in multiple adaptations of the book.