wigeon vs baldpate

wigeon and baldpate both are nouns.

Word	Noun	Adjective	Verb	Adverb
wigeon	Yes	No	No	No
baldpate	Yes	No	No	No

As nouns, baldpate is a hyponym of wigeon; that is, baldpate is a word with a more specific, narrower meaning than wigeon:

wigeon: freshwater duck of Eurasia and northern Africa related to mallards and teals
baldpate: a widgeon the male of which has a white crown

Other hyponyms of wigeon include American widgeon, Anas americana.

wigeon (noun)	baldpate (noun)
freshwater duck of Eurasia and northern Africa related to mallards and teals	a widgeon the male of which has a white crown
	a person whose head is bald or shaved