Suborder Pachycephalosaurus is a classification of dinosaur that lived during the Late Cretaceous period. It is known for its thick skull, which it likely used for head-butting during mating rituals or territorial disputes. Other terms that can be used as synonyms for Suborder Pachycephalosaurus include "thick-headed lizard," "dome-headed dinosaur," and "thick-skulled saurian." While this impressive dinosaur may no longer roam the earth, its legacy lives on through scientific research and popular culture. It continues to inspire awe and fascination among paleontologists and dinosaur enthusiasts alike, and its unique features make it a valuable addition to our understanding of prehistoric life.