Aix sponsa vs wood duck

Aix sponsa and wood duck both are nouns.

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

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

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

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

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