Rhynchocephalia vs animal order

Rhynchocephalia and animal order both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rhynchocephalia	Yes	No	No	No
animal order	Yes	No	No	No

As nouns, animal order is a hypernym of Rhynchocephalia; that is, animal order is a word with a broader meaning than Rhynchocephalia:

Rhynchocephalia (noun)	animal order (noun)
tuataras; extinct forms from middle Triassic	the order of animals