Spanish mackerel vs scad

Spanish mackerel and scad both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spanish mackerel	Yes	No	No	No
scad	Yes	No	No	No

As nouns, scad is a hypernym of Spanish mackerel; that is, scad is a word with a broader meaning than Spanish mackerel:

Spanish mackerel (noun)	scad (noun)
any of several large marine food fishes of the genus Scomberomorus	any of a number of fishes of the family Carangidae
medium-sized mackerel of temperate Atlantic and Gulf of Mexico
a California food fish
flesh of commercially important fishes especially of the Atlantic coastal waters of America