smutty vs filthy

smutty and filthy both are adjectives.

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

As adjectives, smutty and filthy are synonyms defined as:

Other synonyms of smutty include cruddy, foul, nasty.

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