nastiness vs filthiness

nastiness and filthiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
nastiness	Yes	No	No	No
filthiness	Yes	No	No	No

As nouns, nastiness and filthiness are synonyms defined as:

nastiness and filthiness: a state characterized by foul or disgusting dirt and refuse

Other synonyms of nastiness include filth, foulness.

nastiness (noun)	filthiness (noun)
the quality of being highly unpleasant	moral corruption or pollution
malevolence by virtue of being malicious or spiteful or nasty	a state characterized by foul or disgusting dirt and refuse
a state characterized by foul or disgusting dirt and refuse