unreal vs ersatz

unreal is not a noun while ersatz is a noun.

Word	Noun	Adjective	Verb	Adverb
unreal	No	Yes	No	No
ersatz	Yes	Yes	No	No

unreal (noun)	ersatz (noun)
	an artificial or inferior substitute or imitation

unreal (adjective)	ersatz (adjective)
lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria	artificial and inferior
not actually such; being or seeming fanciful or imaginary
lacking material form or substance; unreal
contrived by art rather than nature