percoidean vs percoid

percoidean and percoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
percoidean	Yes	No	No	No
percoid	Yes	No	No	No

As nouns, percoidean and percoid are synonyms defined as:

percoidean and percoid: any of numerous spiny-finned fishes of the order Perciformes

Other synonyms of percoidean include percoid fish.

percoidean (noun)	percoid (noun)
any of numerous spiny-finned fishes of the order Perciformes	any of numerous spiny-finned fishes of the order Perciformes