ousel vs blackbird

ousel and blackbird both are nouns.

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

As nouns, ousel and blackbird are synonyms defined as:

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

ousel (noun)	blackbird (noun)
common black European thrush	any bird of the family Icteridae whose male is black or predominantly black
	common black European thrush