monopoly vs dominance

monopoly and dominance both are nouns.

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

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

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

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

monopoly (noun)	dominance (noun)
(economics) a market in which there are many buyers but only one seller	the power or right to give orders or make decisions
exclusive control or possession of something	superior development of one side of the body
	the organic phenomenon in which one of a pair of alleles present in a genotype is expressed in the phenotype and the other allele of the pair is not
	the state that exists when one person or group has power over another