slickness vs hanky panky

slickness and hanky panky both are nouns.

Word	Noun	Adjective	Verb	Adverb
slickness	Yes	No	No	No
hanky panky	Yes	No	No	No

As nouns, slickness and hanky panky are synonyms defined as:

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

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

slickness (noun)	hanky panky (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