lefteyed flounder vs lefteye flounder

lefteyed flounder and lefteye flounder both are nouns.

Word	Noun	Adjective	Verb	Adverb
lefteyed flounder	Yes	No	No	No
lefteye flounder	Yes	No	No	No

As nouns, lefteyed flounder and lefteye flounder are synonyms defined as:

lefteyed flounder and lefteye flounder: flatfishes with both eyes on the left side of the head

lefteyed flounder (noun)	lefteye flounder (noun)
flatfishes with both eyes on the left side of the head	flatfishes with both eyes on the left side of the head