say-so vs dominance

say-so and dominance both are nouns.

Word	Noun	Adjective	Verb	Adverb
say-so	Yes	No	No	No
dominance	Yes	No	No	No

As nouns, say-so and dominance are synonyms defined as:

say-so and dominance: the power or right to give orders or make decisions

Other synonyms of say-so include authorisation, authority, authorization, potency.

say-so (noun)	dominance (noun)
the power or right to give orders or make decisions	the power or right to give orders or make decisions
an authoritative declaration	superior development of one side of the body
one chap's arbitrary assertion	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