wood duck vs Aix sponsa

wood duck and Aix sponsa both are nouns.

Word	Noun	Adjective	Verb	Adverb
wood duck	Yes	No	No	No
Aix sponsa	Yes	No	No	No

As nouns, wood duck and Aix sponsa are synonyms defined as:

wood duck and Aix sponsa: showy North American duck that nests in hollow trees

Other synonyms of wood duck include summer duck, wood widgeon.

wood duck (noun)	Aix sponsa (noun)
showy North American duck that nests in hollow trees	showy North American duck that nests in hollow trees