madly vs deucedly

madly and deucedly both are adverbs.

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

As adverbs, madly and deucedly are synonyms defined as:

Other synonyms of madly include deadly, devilishly, insanely.

madly (adverb)	deucedly (adverb)
(used as intensives) excessively	(used as intensives) excessively
in an insane manner
in an ungovernable manner