obdurately vs cussedly

obdurately and cussedly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
obdurately	No	No	No	Yes
cussedly	No	No	No	Yes

As adverbs, obdurately and cussedly are synonyms defined as:

Other synonyms of obdurately include mulishly, obstinately, pig-headedly, stubbornly.

obdurately (adverb)	cussedly (adverb)
in a stubborn unregenerate manner	in a stubborn unregenerate manner