obstinance vs pigheadedness

obstinance and pigheadedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
obstinance	Yes	No	No	No
pigheadedness	Yes	No	No	No

As nouns, obstinance and pigheadedness are synonyms defined as:

obstinance and pigheadedness: resolute adherence to your own ideas or desires

Other synonyms of obstinance include bullheadedness, obstinacy, self-will, stubbornness.

obstinance (noun)	pigheadedness (noun)
the trait of being difficult to handle or overcome	resolute adherence to your own ideas or desires
resolute adherence to your own ideas or desires