anatotitan vs hadrosaur

anatotitan and hadrosaur both are nouns.

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

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

anatotitan: one of the largest and most famous duck-billed dinosaurs
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 anatotitan include duck-billed dinosaur, hadrosaurus.

anatotitan (noun)	hadrosaur (noun)
one of the largest and most famous duck-billed dinosaurs	any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic