pterosaur vs flying reptile

pterosaur and flying reptile both are nouns.

Word	Noun	Adjective	Verb	Adverb
pterosaur	Yes	No	No	No
flying reptile	Yes	No	No	No

As nouns, pterosaur and flying reptile are synonyms defined as:

pterosaur and flying reptile: an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb

pterosaur (noun)	flying reptile (noun)
an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb	an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb