surgeonfish vs percoidean

surgeonfish and percoidean both are nouns.

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

As nouns, percoidean is a hypernym of surgeonfish; that is, percoidean is a word with a broader meaning than surgeonfish:

surgeonfish: brightly colored coral-reef fish with knifelike spines at the tail
percoidean: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of surgeonfish include percoid, percoid fish.

surgeonfish (noun)	percoidean (noun)
brightly colored coral-reef fish with knifelike spines at the tail	any of numerous spiny-finned fishes of the order Perciformes