wickedness vs foulness

wickedness and foulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
wickedness	Yes	No	No	No
foulness	Yes	No	No	No

As nouns, foulness is a hyponym of wickedness; that is, foulness is a word with a more specific, narrower meaning than wickedness:

wickedness (noun)	foulness (noun)
morally objectionable behavior	the attribute of having a strong offensive smell
the quality of being wicked	(of weather) the badness of the weather
estrangement from god	a state characterized by foul or disgusting dirt and refuse
the quality of being disgusting to the senses or emotions	disgusting wickedness and immorality
absence of moral or spiritual values