devilishly vs deucedly

devilishly and deucedly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
devilishly	No	No	No	Yes
deucedly	No	No	No	Yes

As adverbs, devilishly and deucedly are synonyms defined as:

Other synonyms of devilishly include deadly, insanely, madly.

devilishly (adverb)	deucedly (adverb)
in a playfully devilish manner	(used as intensives) excessively
(used as intensives) excessively
as a devil; in an evil manner