European blackbird vs ouzel

European blackbird and ouzel both are nouns.

Word	Noun	Adjective	Verb	Adverb
European blackbird	Yes	No	No	No
ouzel	Yes	No	No	No

As nouns, European blackbird and ouzel are synonyms defined as:

Other synonyms of European blackbird include blackbird, merl, merle, ousel, Turdus merula.

European blackbird (noun)	ouzel (noun)
common black European thrush	common black European thrush