dolphinfish vs dolphin

dolphinfish and dolphin both are nouns.

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

As nouns, dolphinfish and dolphin are synonyms defined as:

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

Other synonyms of dolphinfish include mahimahi.

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