order Stereospondyli vs Labyrinthodontia

order Stereospondyli and Labyrinthodontia both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Stereospondyli	Yes	No	No	No
Labyrinthodontia	Yes	No	No	No

order Stereospondyli (noun)	Labyrinthodontia (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