inadvisability vs badness

inadvisability and badness both are nouns.

Word	Noun	Adjective	Verb	Adverb
inadvisability	Yes	No	No	No
badness	Yes	No	No	No

As nouns, badness is a hypernym of inadvisability; that is, badness is a word with a broader meaning than inadvisability:

inadvisability: the quality of being ill-advised
badness: that which is below standard or expectations as of ethics or decency

Other hypernyms of inadvisability include bad.

inadvisability (noun)	badness (noun)
the quality of being ill-advised	that which is below standard or expectations as of ethics or decency
	used of the degree of something undesirable e.g. pain or weather
	an attribute of mischievous children