barosaur vs barosaurus

barosaur and barosaurus both are nouns.

Word	Noun	Adjective	Verb	Adverb
barosaur	Yes	No	No	No
barosaurus	Yes	No	No	No

As nouns, barosaur and barosaurus are synonyms defined as:

barosaur and barosaurus: a dinosaur that could grow to be as tall as a building five stories tall

barosaur (noun)	barosaurus (noun)
a dinosaur that could grow to be as tall as a building five stories tall	a dinosaur that could grow to be as tall as a building five stories tall