trachodon vs hadrosaur

trachodon and hadrosaur both are nouns.

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

As nouns, hadrosaur is a hypernym of trachodon; that is, hadrosaur is a word with a broader meaning than trachodon:

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

Other hypernyms of trachodon include duck-billed dinosaur, hadrosaurus.

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