virtuousness vs virtue

virtuousness and virtue both are nouns.

Word	Noun	Adjective	Verb	Adverb
virtuousness	Yes	No	No	No
virtue	Yes	No	No	No

As nouns, virtuousness and virtue are synonyms defined as:

virtuousness and virtue: the quality of doing what is right and avoiding what is wrong

Other synonyms of virtuousness include moral excellence.

virtuousness (noun)	virtue (noun)
the quality of doing what is right and avoiding what is wrong	the quality of doing what is right and avoiding what is wrong
	morality with respect to sexual relations
	any admirable quality or attribute
	a particular moral excellence