Cydippea vs Cydippidea

Cydippea and Cydippidea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cydippea	Yes	No	No	No
Cydippidea	Yes	No	No	No

As nouns, Cydippea and Cydippidea are synonyms defined as:

Other synonyms of Cydippea include Cydippida, order Cydippea, order Cydippida, order Cydippidea.

Cydippea (noun)	Cydippidea (noun)
ctenophores having two long pinnate tentacles	ctenophores having two long pinnate tentacles