Stegocephalia vs order Stegocephalia

Stegocephalia and order Stegocephalia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stegocephalia	Yes	No	No	No
order Stegocephalia	Yes	No	No	No

As nouns, Stegocephalia and order Stegocephalia are synonyms defined as:

Stegocephalia and order Stegocephalia: in former classifications a division of class Amphibia comprising all pre-Jurassic and some later extinct large salamandriform amphibia

Stegocephalia (noun)	order Stegocephalia (noun)
in former classifications a division of class Amphibia comprising all pre-Jurassic and some later extinct large salamandriform amphibia	in former classifications a division of class Amphibia comprising all pre-Jurassic and some later extinct large salamandriform amphibia