European blackbird vs merl

European blackbird and merl both are nouns.

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

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

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

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