Thecodontia vs animal order

Thecodontia and animal order both are nouns.

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

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

Thecodontia: extinct terrestrial reptiles having teeth set in sockets; of the late Permian to Triassic
animal order: the order of animals

Thecodontia (noun)	animal order (noun)
extinct terrestrial reptiles having teeth set in sockets; of the late Permian to Triassic	the order of animals