slickness vs jiggery-pokery

slickness and jiggery-pokery both are nouns.

Word	Noun	Adjective	Verb	Adverb
slickness	Yes	No	No	No
jiggery-pokery	Yes	No	No	No

As nouns, slickness and jiggery-pokery are synonyms defined as:

slickness and jiggery-pokery: verbal misrepresentation intended to take advantage of you in some way

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

slickness (noun)	jiggery-pokery (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