obdurately vs stubbornly

obdurately and stubbornly both are adverbs.

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

As adverbs, obdurately and stubbornly are synonyms defined as:

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

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