monopoly vs ascendancy

monopoly and ascendancy both are nouns.

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

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

monopoly: exclusive control or possession of something
ascendancy: the state that exists when one person or group has power over another

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

monopoly (noun)	ascendancy (noun)
(economics) a market in which there are many buyers but only one seller	the state that exists when one person or group has power over another
exclusive control or possession of something