pig-headedly vs cussedly

pig-headedly and cussedly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
pig-headedly	No	No	No	Yes
cussedly	No	No	No	Yes

As adverbs, pig-headedly and cussedly are synonyms defined as:

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

pig-headedly (adverb)	cussedly (adverb)
in a stubborn unregenerate manner	in a stubborn unregenerate manner