dolphin vs dolphinfish

dolphin and dolphinfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
dolphin	Yes	No	No	No
dolphinfish	Yes	No	No	No

As nouns, dolphin and dolphinfish are synonyms defined as:

dolphin and dolphinfish: large slender food and game fish widely distributed in warm seas (especially around Hawaii)

Other synonyms of dolphin include mahimahi.

dolphin (noun)	dolphinfish (noun)
any of various small toothed whales with a beaklike snout; larger than porpoises	large slender food and game fish widely distributed in warm seas (especially around Hawaii)
large slender food and game fish widely distributed in warm seas (especially around Hawaii)	the lean flesh of a saltwater fish found in warm waters (especially in Hawaii)