wood widgeon vs wood duck

wood widgeon and wood duck both are nouns.

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

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

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

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

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