thunder lizard vs apatosaur

thunder lizard and apatosaur both are nouns.

Word	Noun	Adjective	Verb	Adverb
thunder lizard	Yes	No	No	No
apatosaur	Yes	No	No	No

As nouns, thunder lizard and apatosaur are synonyms defined as:

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

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

thunder lizard (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