supremacy vs ascendance

supremacy and ascendance both are nouns.

Word	Noun	Adjective	Verb	Adverb
supremacy	Yes	No	No	No
ascendance	Yes	No	No	No

As nouns, ascendance is a hypernym of supremacy; that is, ascendance is a word with a broader meaning than supremacy:

supremacy: power to dominate or defeat
ascendance: the state that exists when one person or group has power over another

Other hypernyms of supremacy include ascendancy, ascendence, ascendency, control, dominance.

supremacy (noun)	ascendance (noun)
power to dominate or defeat	the state that exists when one person or group has power over another