good faith vs straightness

good faith and straightness both are nouns.

Word	Noun	Adjective	Verb	Adverb
good faith	Yes	No	No	No
straightness	Yes	No	No	No

As nouns, good faith and straightness are synonyms defined as:

good faith (noun)	straightness (noun)
having honest intentions	a sexual attraction to (or sexual relations with) persons of the opposite sex
	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