bullheadedness vs self-will

bullheadedness and self-will both are nouns.

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

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

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

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

bullheadedness (noun)	self-will (noun)
resolute adherence to your own ideas or desires	resolute adherence to your own ideas or desires
	the trait of resolutely controlling your own behavior