Lophodytes cucullatus vs hooded merganser

Lophodytes cucullatus and hooded merganser both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lophodytes cucullatus	Yes	No	No	No
hooded merganser	Yes	No	No	No

As nouns, Lophodytes cucullatus and hooded merganser are synonyms defined as:

Lophodytes cucullatus and hooded merganser: small North American duck with a high circular crest on the male's head

Other synonyms of Lophodytes cucullatus include hooded sheldrake.

Lophodytes cucullatus (noun)	hooded merganser (noun)
small North American duck with a high circular crest on the male's head	small North American duck with a high circular crest on the male's head