merganser vs sawbill

merganser and sawbill both are nouns.

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

As nouns, merganser and sawbill are synonyms defined as:

merganser and sawbill: large crested fish-eating diving duck having a slender hooked bill with serrated edges

Other synonyms of merganser include fish duck, sheldrake.

merganser (noun)	sawbill (noun)
large crested fish-eating diving duck having a slender hooked bill with serrated edges	large crested fish-eating diving duck having a slender hooked bill with serrated edges