painstakingness vs conscientiousness

painstakingness and conscientiousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
painstakingness	Yes	No	No	No
conscientiousness	Yes	No	No	No

As nouns, painstakingness and conscientiousness are synonyms defined as:

painstakingness and conscientiousness: the trait of being painstaking and careful

painstakingness (noun)	conscientiousness (noun)
the trait of being painstaking and careful	the quality of being in accord with the dictates of conscience
	the trait of being painstaking and careful