candor vs ingenuousness

candor and ingenuousness both are nouns.

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

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

candor: the quality of being honest and straightforward in attitude and speech
ingenuousness: openly straightforward or frank

candor (noun)	ingenuousness (noun)
the quality of being honest and straightforward in attitude and speech	openly straightforward or frank
ability to make judgments free from discrimination or dishonesty	the quality of innocent naivete