order Euphausiacea vs krill

order Euphausiacea and krill both are nouns.

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

order Euphausiacea (noun)	krill (noun)
small commonly luminescent crustaceans; important element of marine plankton: krill	shrimp-like planktonic crustaceans; major source of food for e.g. baleen whales