dirtiness vs filth

dirtiness and filth both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirtiness	Yes	No	No	No
filth	Yes	No	No	No

As nouns, filth is a hyponym of dirtiness; that is, filth is a word with a more specific, narrower meaning than dirtiness:

dirtiness (noun)	filth (noun)
obscenity in speech or writing	an offensive or indecent word or phrase
the state of being unsanitary	a state characterized by foul or disgusting dirt and refuse
the state of containing dirty impurities	anything regarded as making something unclean
	any substance considered disgustingly foul or unpleasant