realism vs unreal

realism is a noun but unreal is not a noun.

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

realism (noun)	unreal (noun)
the attribute of accepting the facts of life and favoring practicality and literal truth
(philosophy) the philosophical doctrine that physical objects continue to exist when not perceived
(philosophy) the philosophical doctrine that abstract concepts exist independent of their names
an artistic movement in 19th century France; artists and writers strove for detailed realistic and factual description
the state of being actual or real

realism (adjective)	unreal (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