slickness vs skullduggery

slickness and skullduggery both are nouns.

Word	Noun	Adjective	Verb	Adverb
slickness	Yes	No	No	No
skullduggery	Yes	No	No	No

As nouns, slickness and skullduggery are synonyms defined as:

slickness and skullduggery: verbal misrepresentation intended to take advantage of you in some way

Other synonyms of slickness include hanky panky, hocus-pocus, jiggery-pokery, skulduggery, trickery.

slickness (noun)	skullduggery (noun)
a slippery smoothness	verbal misrepresentation intended to take advantage of you in some way
a kind of fluent easy superficiality
verbal misrepresentation intended to take advantage of you in some way