Stereospondyli vs superorder Labyrinthodonta

Stereospondyli and superorder Labyrinthodonta both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stereospondyli	Yes	No	No	No
superorder Labyrinthodonta	Yes	No	No	No

Stereospondyli (noun)	superorder Labyrinthodonta (noun)
formerly a suborder of Stegocephalia; amphibia having vertebrae whose component elements are fused into a single piece	extinct amphibians typically resembling heavy-bodied salamanders or crocodiles and having a solid flattened skull and conical teeth; Devonian through Triassic