Dinornithiformes vs order Dinornithiformes

Dinornithiformes and order Dinornithiformes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dinornithiformes	Yes	No	No	No
order Dinornithiformes	Yes	No	No	No

As nouns, Dinornithiformes and order Dinornithiformes are synonyms defined as:

Dinornithiformes and order Dinornithiformes: a ratite bird order: recently extinct flightless birds of New Zealand

Dinornithiformes (noun)	order Dinornithiformes (noun)
a ratite bird order: recently extinct flightless birds of New Zealand	a ratite bird order: recently extinct flightless birds of New Zealand