realism vs realness

realism and realness both are nouns.

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

As nouns, realism and realness are synonyms defined as:

Other synonyms of realism include reality.

realism (noun)	realness (noun)
the attribute of accepting the facts of life and favoring practicality and literal truth	the state of being actual or real
(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