redfish vs drumfish

redfish and drumfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
redfish	Yes	No	No	No
drumfish	Yes	No	No	No

As nouns, drumfish is a hypernym of redfish; that is, drumfish is a word with a broader meaning than redfish:

redfish: large edible fish found off coast of United States from Massachusetts to Mexico
drumfish: small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise

Other hypernyms of redfish include drum.

redfish (noun)	drumfish (noun)
male salmon that has recently spawned	small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise
large edible fish found off coast of United States from Massachusetts to Mexico
North Atlantic rockfish