dipper vs butterball

dipper and butterball both are nouns.

Word	Noun	Adjective	Verb	Adverb
dipper	Yes	No	No	No
butterball	Yes	No	No	No

As nouns, dipper and butterball are synonyms defined as:

dipper and butterball: small North American diving duck; males have bushy head plumage

Other synonyms of dipper include Bucephela albeola, bufflehead.

dipper (noun)	butterball (noun)
small North American diving duck; males have bushy head plumage	small North American diving duck; males have bushy head plumage
small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom	a rotund individual
a ladle that has a cup with a long handle