scrupulousness vs scrupulous

scrupulousness is a noun but scrupulous is not a noun.

Word	Noun	Adjective	Verb	Adverb
scrupulousness	Yes	No	No	No
scrupulous	No	Yes	No	No

scrupulousness (noun)	scrupulous (noun)
conformity to high standards of ethics or excellence
strict attention to minute details

scrupulousness (adjective)	scrupulous (adjective)
	having scruples; arising from a sense of right and wrong; principled
	characterized by extreme care and great effort