fact vs realness

fact and realness both are nouns.

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

As nouns, realness is a hypernym of fact; that is, realness is a word with a broader meaning than fact:

Other hypernyms of fact include realism, reality.

fact (noun)	realness (noun)
a piece of information about circumstances that exist or events that have occurred	the state of being actual or real
a concept whose truth can be proved
a statement or assertion of verified information about something that is the case or has happened
an event known to have happened or something known to have existed