gurnard vs searobin

gurnard and searobin both are nouns.

Word	Noun	Adjective	Verb	Adverb
gurnard	Yes	No	No	No
searobin	Yes	No	No	No

As nouns, searobin is a hyponym of gurnard; that is, searobin is a word with a more specific, narrower meaning than gurnard:

gurnard: bottom-dwelling coastal fishes with spiny armored heads and fingerlike pectoral fins used for crawling along the sea bottom
searobin: American gurnard; mostly found in bays and estuaries

Other hyponyms of gurnard include Trigla lucerna, tub gurnard, yellow gurnard, sea robin.

gurnard (noun)	searobin (noun)
bottom-dwelling coastal fishes with spiny armored heads and fingerlike pectoral fins used for crawling along the sea bottom	American gurnard; mostly found in bays and estuaries