mastery vs superiority

mastery and superiority both are nouns.

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

As nouns, superiority is a hyponym of mastery; that is, superiority is a word with a more specific, narrower meaning than mastery:

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

Other hyponyms of mastery include transcendence, transcendency.

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