(n.) The quality or state of being bluff.

absolute realism authenticity bluffness bluntness bona fideness broadness brusqueness candidness candor directness forthrightness frankness freedom freeness genuineness honesty inartificiality ingenuousness intactness legitimacy lifelikeness literalism literality literalness natural man natural state naturalism naturalness nature openheartedness openness outspokenness photographic realism plain dealing plain speaking plainness plainspokenness pristineness realism realness roundness sincerity state of nature straightforwardness true-to-lifeness truth to nature unadulteration unaffectedness unconstraint unfictitiousness unreserve unrestraint unspeciousness unspuriousness unsyntheticness verisimilitude virginity