Aix sponsa vs summer duck

Aix sponsa and summer duck both are nouns.

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

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

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

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

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