Melanogrammus aeglefinus vs haddock

Melanogrammus aeglefinus and haddock both are nouns.

Word	Noun	Adjective	Verb	Adverb
Melanogrammus aeglefinus	Yes	No	No	No
haddock	Yes	No	No	No

As nouns, Melanogrammus aeglefinus and haddock are synonyms defined as:

Melanogrammus aeglefinus and haddock: important food fish on both sides of the Atlantic; related to cod but usually smaller

Melanogrammus aeglefinus (noun)	haddock (noun)
important food fish on both sides of the Atlantic; related to cod but usually smaller	important food fish on both sides of the Atlantic; related to cod but usually smaller
	lean white flesh of fish similar to but smaller than cod; usually baked or poached or as fillets sauteed or fried