barosaur vs sauropod dinosaur

barosaur and sauropod dinosaur both are nouns.

Word	Noun	Adjective	Verb	Adverb
barosaur	Yes	No	No	No
sauropod dinosaur	Yes	No	No	No

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

barosaur: a dinosaur that could grow to be as tall as a building five stories tall
sauropod dinosaur: very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head on a long neck and tail and five-toed limbs; largest known land animal

Other hypernyms of barosaur include sauropod.

barosaur (noun)	sauropod dinosaur (noun)
a dinosaur that could grow to be as tall as a building five stories tall	very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head on a long neck and tail and five-toed limbs; largest known land animal