rabidity vs bullheadedness

rabidity and bullheadedness both are nouns.

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

As nouns, bullheadedness is a hypernym of rabidity; that is, bullheadedness is a word with a broader meaning than rabidity:

rabidity: The property of being very extreme, unreasonable, or fanatical in opinion; excessively zealous; comparable to one with rabies.
bullheadedness: resolute adherence to your own ideas or desires

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

rabidity (noun)	bullheadedness (noun)
unrestrained excitement or enthusiasm	resolute adherence to your own ideas or desires
The property of being very extreme, unreasonable, or fanatical in opinion; excessively zealous; comparable to one with rabies.