filth vs icky

filth is a noun but icky is not a noun.

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

filth (noun)	icky (noun)
an offensive or indecent word or phrase
a state characterized by foul or disgusting dirt and refuse
anything regarded as making something unclean
any substance considered disgustingly foul or unpleasant

filth (adjective)	icky (adjective)
	soft and sticky
	very bad