barosaurus vs barosaur

barosaurus and barosaur both are nouns.

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

As nouns, barosaurus and barosaur are synonyms defined as:

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

barosaurus (noun)	barosaur (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