canvasback duck vs Aythya valisineria

canvasback duck and Aythya valisineria both are nouns.

Word	Noun	Adjective	Verb	Adverb
canvasback duck	Yes	No	No	No
Aythya valisineria	Yes	No	No	No

As nouns, canvasback duck and Aythya valisineria are synonyms defined as:

canvasback duck and Aythya valisineria: North American wild duck valued for sport and food

Other synonyms of canvasback duck include canvasback.

canvasback duck (noun)	Aythya valisineria (noun)
North American wild duck valued for sport and food	North American wild duck valued for sport and food