predomination vs ascendancy

predomination and ascendancy both are nouns.

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

As nouns, ascendancy is a hypernym of predomination; that is, ascendancy is a word with a broader meaning than predomination:

predomination: the state of being predominant over others
ascendancy: the state that exists when one person or group has power over another

Other hypernyms of predomination include ascendance, ascendence, ascendency, control, dominance.

predomination (noun)	ascendancy (noun)
the quality of being more noticeable than anything else	the state that exists when one person or group has power over another
the state of being predominant over others