order Ephemeroptera vs Ephemeroptera

order Ephemeroptera and Ephemeroptera both are nouns.

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

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

order Ephemeroptera and Ephemeroptera: the order of mayflies or shadflies (Ephemeroptera, Ephemerida)

Other synonyms of order Ephemeroptera include Ephemerida, order Ephemerida.

order Ephemeroptera (noun)	Ephemeroptera (noun)
the order of mayflies or shadflies (Ephemeroptera, Ephemerida)	the order of mayflies or shadflies (Ephemeroptera, Ephemerida)