forthrightness vs candidness

forthrightness and candidness both are nouns.

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

As nouns, forthrightness and candidness are synonyms defined as:

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

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

forthrightness (noun)	candidness (noun)
the quality of being honest and straightforward in attitude and speech	the quality of being honest and straightforward in attitude and speech