tuna vs albacore

tuna and albacore both are nouns.

Word	Noun	Adjective	Verb	Adverb
tuna	Yes	No	No	No
albacore	Yes	No	No	No

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

tuna: any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters
albacore: large pelagic tuna the source of most canned tuna; reaches 93 pounds and has long pectoral fins; found worldwide in tropical and temperate waters

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

tuna: important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks
albacore: relatively small tuna with choice white flesh; major source of canned tuna

Other hyponyms of tuna include bonito, bluefin, bluefin tuna.

tuna (noun)	albacore (noun)
any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters	large pelagic tuna the source of most canned tuna; reaches 93 pounds and has long pectoral fins; found worldwide in tropical and temperate waters
New Zealand eel	relatively small tuna with choice white flesh; major source of canned tuna
important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks
tropical American prickly pear of Jamaica