Apatosaurus excelsus vs brontosaurus

Apatosaurus excelsus and brontosaurus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Apatosaurus excelsus	Yes	No	No	No
brontosaurus	Yes	No	No	No

As nouns, Apatosaurus excelsus and brontosaurus are synonyms defined as:

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

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

Apatosaurus excelsus (noun)	brontosaurus (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