ousel vs merle

ousel and merle both are nouns.

Word	Noun	Adjective	Verb	Adverb
ousel	Yes	No	No	No
merle	Yes	No	No	No

As nouns, ousel and merle are synonyms defined as:

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

ousel (noun)	merle (noun)
common black European thrush	common black European thrush