Monodon monoceros vs narwhal

Monodon monoceros and narwhal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Monodon monoceros	Yes	No	No	No
narwhal	Yes	No	No	No

As nouns, Monodon monoceros and narwhal are synonyms defined as:

Monodon monoceros and narwhal: small Arctic whale the male having a long spiral ivory tusk

Other synonyms of Monodon monoceros include narwal, narwhale.

Monodon monoceros (noun)	narwhal (noun)
small Arctic whale the male having a long spiral ivory tusk	small Arctic whale the male having a long spiral ivory tusk