intransigency vs obstinacy

intransigency and obstinacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
intransigency	Yes	No	No	No
obstinacy	Yes	No	No	No

As nouns, obstinacy is a hypernym of intransigency; that is, obstinacy is a word with a broader meaning than intransigency:

intransigency: the trait of being intransigent; stubbornly refusing to compromise
obstinacy: resolute adherence to your own ideas or desires

Other hypernyms of intransigency include bullheadedness, obstinance, pigheadedness, self-will, stubbornness.

intransigency (noun)	obstinacy (noun)
the trait of being intransigent; stubbornly refusing to compromise	the trait of being difficult to handle or overcome
	resolute adherence to your own ideas or desires