realness vs fact

realness and fact both are nouns.

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

As nouns, fact is a hyponym of realness; that is, fact is a word with a more specific, narrower meaning than realness:

realness (noun)	fact (noun)
the state of being actual or real	a piece of information about circumstances that exist or events that have occurred
	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