grunt vs percoid

grunt and percoid both are nouns.

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

As nouns, percoid is a hypernym of grunt; that is, percoid is a word with a broader meaning than grunt:

grunt: medium-sized tropical marine food fishes that utter grunting sounds when caught
percoid: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of grunt include percoid fish, percoidean.

grunt (noun)	percoid (noun)
medium-sized tropical marine food fishes that utter grunting sounds when caught	any of numerous spiny-finned fishes of the order Perciformes
the short low gruff noise of the kind made by hogs
an unskilled or low-ranking soldier or other worker

grunt (verb)	percoid (verb)
issue a grunting, low, animal-like noise