Euphausiacea vs order Euphausiacea

Euphausiacea and order Euphausiacea both are nouns.

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

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

Euphausiacea and order Euphausiacea: small commonly luminescent crustaceans; important element of marine plankton: krill

Euphausiacea (noun)	order Euphausiacea (noun)
small commonly luminescent crustaceans; important element of marine plankton: krill	small commonly luminescent crustaceans; important element of marine plankton: krill