clingfish vs percoidean

clingfish and percoidean both are nouns.

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

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

clingfish: very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
percoidean: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of clingfish include percoid, percoid fish.

clingfish (noun)	percoidean (noun)
very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.	any of numerous spiny-finned fishes of the order Perciformes