realness vs realism

realness and realism both are nouns.

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

As nouns, realness and realism are synonyms defined as:

Other synonyms of realness include reality.

realness (noun)	realism (noun)
the state of being actual or real	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