skulduggery vs skullduggery

skulduggery and skullduggery both are nouns.

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

As nouns, skulduggery and skullduggery are synonyms defined as:

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

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

skulduggery (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