Casuariiformes vs animal order

Casuariiformes and animal order both are nouns.

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

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

Casuariiformes (noun)	animal order (noun)
a ratite bird order: cassowaries and emus	the order of animals