Clangula hyemalis vs old squaw

Clangula hyemalis and old squaw both are nouns.

Word	Noun	Adjective	Verb	Adverb
Clangula hyemalis	Yes	No	No	No
old squaw	Yes	No	No	No

As nouns, Clangula hyemalis and old squaw are synonyms defined as:

Clangula hyemalis and old squaw: a common long-tailed sea duck of the northern parts of the United States

Other synonyms of Clangula hyemalis include oldwife.

Clangula hyemalis (noun)	old squaw (noun)
a common long-tailed sea duck of the northern parts of the United States	a common long-tailed sea duck of the northern parts of the United States