hadrosaur vs trachodont

hadrosaur and trachodont both are nouns.

Word	Noun	Adjective	Verb	Adverb
hadrosaur	Yes	No	No	No
trachodont	Yes	No	No	No

As nouns, trachodont is a hyponym of hadrosaur; that is, trachodont is a word with a more specific, narrower meaning than hadrosaur:

hadrosaur: any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
trachodont: large duck-billed dinosaur of the Cretaceous period

Other hyponyms of hadrosaur include anatotitan, corythosaur, corythosaurus, edmontosaurus, trachodon.

hadrosaur (noun)	trachodont (noun)
any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic	large duck-billed dinosaur of the Cretaceous period