superiority vs mastery

superiority and mastery both are nouns.

Word	Noun	Adjective	Verb	Adverb
superiority	Yes	No	No	No
mastery	Yes	No	No	No

As nouns, mastery is a hypernym of superiority; that is, mastery is a word with a broader meaning than superiority:

superiority: the state of excelling or surpassing or going beyond usual limits
mastery: power to dominate or defeat

Other hypernyms of superiority include domination, supremacy.

superiority (noun)	mastery (noun)
the quality of being superior	the act of mastering or subordinating someone
the quality of being at a competitive advantage	great skillfulness and knowledge of some subject or activity
displaying a sense of being better than others	power to dominate or defeat
the state of excelling or surpassing or going beyond usual limits