order Xiphosura vs animal order

order Xiphosura and animal order both are nouns.

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

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

order Xiphosura (noun)	animal order (noun)
horseshoe crabs and extinct forms	the order of animals