tunny vs tuna fish

tunny and tuna fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
tunny	Yes	No	No	No
tuna fish	Yes	No	No	No

As nouns, tunny and tuna fish are synonyms defined as:

tunny and tuna fish: important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks

Other synonyms of tunny include tuna.

tunny (noun)	tuna fish (noun)
any very large marine food and game fish of the genus Thunnus; related to mackerel; chiefly of warm waters	important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks
important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks