obstinately vs obdurately

obstinately and obdurately both are adverbs.

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

As adverbs, obstinately and obdurately are synonyms defined as:

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

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