Gadus macrocephalus vs Alaska cod

Gadus macrocephalus and Alaska cod both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gadus macrocephalus	Yes	No	No	No
Alaska cod	Yes	No	No	No

As nouns, Gadus macrocephalus and Alaska cod are synonyms defined as:

Other synonyms of Gadus macrocephalus include Pacific cod.

Gadus macrocephalus (noun)	Alaska cod (noun)
closely related to Atlantic cod	closely related to Atlantic cod