stubbornness vs bullheadedness

stubbornness and bullheadedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
stubbornness	Yes	No	No	No
bullheadedness	Yes	No	No	No

As nouns, stubbornness and bullheadedness are synonyms defined as:

stubbornness and bullheadedness: resolute adherence to your own ideas or desires

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

stubbornness (noun)	bullheadedness (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