filthy vs sex

filthy is not a noun while sex is a noun.

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

filthy (noun)	sex (noun)
	activities associated with sexual intercourse
	the properties that distinguish organisms on the basis of their reproductive roles
	all of the feelings resulting from the urge to gratify sexual impulses
	either of the two categories (male or female) into which most organisms are divided

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

filthy (verb)	sex (verb)
	tell the sex (of young chickens)
	to evoke sexual feelings