brontosaurus vs apatosaurus

brontosaurus and apatosaurus both are nouns.

Word	Noun	Adjective	Verb	Adverb
brontosaurus	Yes	No	No	No
apatosaurus	Yes	No	No	No

As nouns, brontosaurus and apatosaurus are synonyms defined as:

brontosaurus and apatosaurus: huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic

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

brontosaurus (noun)	apatosaurus (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