bonito vs scombroid fish

bonito and scombroid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
bonito	Yes	No	No	No
scombroid fish	Yes	No	No	No

As nouns, scombroid fish is a hypernym of bonito; that is, scombroid fish is a word with a broader meaning than bonito:

bonito: any of various scombroid fishes intermediate in size and characteristics between mackerels and tunas
scombroid fish: important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters

Other hypernyms of bonito include scombroid.

As nouns, scombroid fish is a hypernym of bonito; that is, scombroid fish is a word with a broader meaning than bonito:

bonito: fish whose flesh is dried and flaked for Japanese cookery; may be same species as skipjack tuna
scombroid fish: important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters

Other hypernyms of bonito include scombroid.

bonito (noun)	scombroid fish (noun)
any of various scombroid fishes intermediate in size and characteristics between mackerels and tunas	important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters
fish whose flesh is dried and flaked for Japanese cookery; may be same species as skipjack tuna
flesh of mostly Pacific food fishes of the genus Sarda of the family Scombridae; related to but smaller than tuna