goosander vs sawbill

goosander and sawbill both are nouns.

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

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

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

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

goosander (noun)	sawbill (noun)
common merganser of Europe and North America	large crested fish-eating diving duck having a slender hooked bill with serrated edges