obdurately vs obstinately

obdurately and obstinately both are adverbs.

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

As adverbs, obdurately and obstinately are synonyms defined as:

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

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