unreal vs solidness

unreal is not a noun while solidness is a noun.

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

unreal (noun)	solidness (noun)
	the quality of being substantial or having substance
	the quality of being solid and reliable financially or factually or morally
	the consistency of a solid
	the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape

unreal (adjective)	solidness (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