candidness vs candor

candidness and candor both are nouns.

Word	Noun	Adjective	Verb	Adverb
candidness	Yes	No	No	No
candor	Yes	No	No	No

As nouns, candidness and candor are synonyms defined as:

candidness and candor: the quality of being honest and straightforward in attitude and speech

Other synonyms of candidness include candour, directness, forthrightness, frankness.

candidness (noun)	candor (noun)
the quality of being honest and straightforward in attitude and speech	the quality of being honest and straightforward in attitude and speech
	ability to make judgments free from discrimination or dishonesty