iguanodon vs dinosaur

iguanodon and dinosaur both are nouns.

Word	Noun	Adjective	Verb	Adverb
iguanodon	Yes	No	No	No
dinosaur	Yes	No	No	No

As nouns, dinosaur is a hypernym of iguanodon; that is, dinosaur is a word with a broader meaning than iguanodon:

iguanodon: massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period
dinosaur: any of numerous extinct terrestrial reptiles of the Mesozoic era

iguanodon (noun)	dinosaur (noun)
massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period	any of numerous extinct terrestrial reptiles of the Mesozoic era