Crocodylia vs animal order

Crocodylia and animal order both are nouns.

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

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

Crocodylia (noun)	animal order (noun)
crocodiles, alligators, caimans, gavials	the order of animals