dolphin vs mahimahi

dolphin and mahimahi both are nouns.

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

As nouns, dolphin and mahimahi are synonyms defined as:

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

Other synonyms of dolphin include dolphinfish.

dolphin (noun)	mahimahi (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)