filthy vs smutty

filthy and smutty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
filthy	No	Yes	No	No
smutty	No	Yes	No	No

As adjectives, filthy and smutty are synonyms defined as:

Other synonyms of filthy include cruddy, foul, nasty.

filthy (adjective)	smutty (adjective)
disgustingly dirty; filled or smeared with offensive matter	soiled with dirt or soot
characterized by obscenity	characterized by obscenity
vile; despicable