pigfish vs grunt

pigfish and grunt both are nouns.

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

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

pigfish: found from Long Island southward
grunt: medium-sized tropical marine food fishes that utter grunting sounds when caught

pigfish (noun)	grunt (noun)
found from Long Island southward	medium-sized tropical marine food fishes that utter grunting sounds when caught
found around the Great Barrier Reef	the short low gruff noise of the kind made by hogs
	an unskilled or low-ranking soldier or other worker

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