unreal vs substantialness

unreal is not a noun while substantialness is a noun.

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

unreal (noun)	substantialness (noun)
	the quality of being substantial or having substance

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