honesty vs straightness

honesty and straightness both are nouns.

Word	Noun	Adjective	Verb	Adverb
honesty	Yes	No	No	No
straightness	Yes	No	No	No

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

honesty (noun)	straightness (noun)
the quality of being honest	a sexual attraction to (or sexual relations with) persons of the opposite sex
southeastern European plant cultivated for its fragrant purplish flowers and round flat papery silver-white seedpods that are used for indoor decoration	freedom from crooks or curves or bends or angles
	(of hair) lack of a tendency to curl
	having honest intentions
	trueness of course toward a goal