filthy vs cruddy

filthy and cruddy both are adjectives.

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

As adjectives, filthy and cruddy are synonyms defined as:

Other synonyms of filthy include foul, nasty, smutty.

filthy (adjective)	cruddy (adjective)
disgustingly dirty; filled or smeared with offensive matter	characterized by obscenity
characterized by obscenity
vile; despicable