order Rodentia vs animal order

order Rodentia and animal order both are nouns.

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

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

order Rodentia: small gnawing animals: porcupines, rats, mice, squirrels, marmots, beavers, gophers, voles, hamsters, guinea pigs, agoutis
animal order: the order of animals

order Rodentia (noun)	animal order (noun)
small gnawing animals: porcupines, rats, mice, squirrels, marmots, beavers, gophers, voles, hamsters, guinea pigs, agoutis	the order of animals