Crocodilia vs animal order

Crocodilia and animal order both are nouns.

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

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

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