obstinacy vs self-will

obstinacy and self-will both are nouns.

Word	Noun	Adjective	Verb	Adverb
obstinacy	Yes	No	No	No
self-will	Yes	No	No	No

As nouns, obstinacy and self-will are synonyms defined as:

obstinacy and self-will: resolute adherence to your own ideas or desires

Other synonyms of obstinacy include bullheadedness, obstinance, pigheadedness, stubbornness.

obstinacy (noun)	self-will (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	the trait of resolutely controlling your own behavior