candour vs frankness

candour and frankness both are nouns.

Word	Noun	Adjective	Verb	Adverb
candour	Yes	No	No	No
frankness	Yes	No	No	No

As nouns, candour and frankness are synonyms defined as:

candour and frankness: the quality of being honest and straightforward in attitude and speech

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

candour (noun)	frankness (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	the trait of being blunt and outspoken