ascendancy vs ascendance

ascendancy and ascendance both are nouns.

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

As nouns, ascendancy and ascendance are synonyms defined as:

ascendancy and ascendance: the state that exists when one person or group has power over another

Other synonyms of ascendancy include ascendence, ascendency, control, dominance.

ascendancy (noun)	ascendance (noun)
the state that exists when one person or group has power over another	the state that exists when one person or group has power over another