skullduggery vs hanky panky

skullduggery and hanky panky both are nouns.

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

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

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

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

skullduggery (noun)	hanky panky (noun)
verbal misrepresentation intended to take advantage of you in some way	verbal misrepresentation intended to take advantage of you in some way