Turdus merula vs ouzel

Turdus merula and ouzel both are nouns.

Word	Noun	Adjective	Verb	Adverb
Turdus merula	Yes	No	No	No
ouzel	Yes	No	No	No

As nouns, Turdus merula and ouzel are synonyms defined as:

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

Turdus merula (noun)	ouzel (noun)
common black European thrush	common black European thrush