jiggery-pokery vs skullduggery

jiggery-pokery and skullduggery both are nouns.

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

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

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

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

jiggery-pokery (noun)	skullduggery (noun)
verbal misrepresentation intended to take advantage of you in some way	verbal misrepresentation intended to take advantage of you in some way