wood duck vs wood widgeon

wood duck and wood widgeon both are nouns.

Word	Noun	Adjective	Verb	Adverb
wood duck	Yes	No	No	No
wood widgeon	Yes	No	No	No

As nouns, wood duck and wood widgeon are synonyms defined as:

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

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

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