order Chelonia vs Testudinata

order Chelonia and Testudinata both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Chelonia	Yes	No	No	No
Testudinata	Yes	No	No	No

As nouns, order Chelonia and Testudinata are synonyms defined as:

Other synonyms of order Chelonia include Chelonia, order Testudinata, order Testudines, Testudines.

order Chelonia (noun)	Testudinata (noun)
tortoises and turtles	tortoises and turtles