straightforward vs straightforwardness

straightforward is not a noun while straightforwardness is a noun.

Word	Noun	Adjective	Verb	Adverb
straightforward	No	Yes	No	No
straightforwardness	Yes	No	No	No

straightforward (noun)	straightforwardness (noun)
	the quality of being direct and straightforward
	without hypocrisy

straightforward (adjective)	straightforwardness (adjective)
pointed directly ahead
without evasion or compromise
without concealment or deception; honest
free from ambiguity