brontosaur vs apatosaur

brontosaur and apatosaur both are nouns.

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

As nouns, brontosaur and apatosaur are synonyms defined as:

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

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

brontosaur (noun)	apatosaur (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