dipper vs water ouzel

dipper and water ouzel both are nouns.

Word	Noun	Adjective	Verb	Adverb
dipper	Yes	No	No	No
water ouzel	Yes	No	No	No

As nouns, dipper and water ouzel are synonyms defined as:

dipper and water ouzel: small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom

dipper (noun)	water ouzel (noun)
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
small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom
a ladle that has a cup with a long handle