apatosaur vs brontosaur

apatosaur and brontosaur both are nouns.

Word	Noun	Adjective	Verb	Adverb
apatosaur	Yes	No	No	No
brontosaur	Yes	No	No	No

As nouns, apatosaur and brontosaur are synonyms defined as:

apatosaur and brontosaur: huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic

Other synonyms of apatosaur include apatosaurus, Apatosaurus excelsus, brontosaurus, thunder lizard.

apatosaur (noun)	brontosaur (noun)
huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic	huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic