goosander vs sheldrake

goosander and sheldrake both are nouns.

Word	Noun	Adjective	Verb	Adverb
goosander	Yes	No	No	No
sheldrake	Yes	No	No	No

As nouns, sheldrake is a hypernym of goosander; that is, sheldrake is a word with a broader meaning than goosander:

goosander: common merganser of Europe and North America
sheldrake: large crested fish-eating diving duck having a slender hooked bill with serrated edges

Other hypernyms of goosander include fish duck, merganser, sawbill.

goosander (noun)	sheldrake (noun)
common merganser of Europe and North America	Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill
	large crested fish-eating diving duck having a slender hooked bill with serrated edges