righteye flounder vs righteyed flounder

righteye flounder and righteyed flounder both are nouns.

Word	Noun	Adjective	Verb	Adverb
righteye flounder	Yes	No	No	No
righteyed flounder	Yes	No	No	No

As nouns, righteye flounder and righteyed flounder are synonyms defined as:

righteye flounder and righteyed flounder: flounders with both eyes on the right side of the head

righteye flounder (noun)	righteyed flounder (noun)
flounders with both eyes on the right side of the head	flounders with both eyes on the right side of the head