Saurolophus is a type of hadrosaurid dinosaur that lived during the late Cretaceous period in what is now North America. It was known for its distinctive elongated crest on top of its head and its duckbill-like mouth. Synonyms for the word "saurolophus" include "lizard crest", "crested lizard", and "horned lizard". These synonyms refer to various physical characteristics of the Saurolophus, including its unique crest and lizard-like appearance. Despite the differences in terminology, all of these synonyms point to the same amazing creature that roamed the earth millions of years ago.