ouzel vs ousel

ouzel and ousel both are nouns.

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

As nouns, ouzel and ousel are synonyms defined as:

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

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