sovereignty vs say-so

sovereignty and say-so both are nouns.

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

As nouns, say-so is a hypernym of sovereignty; that is, say-so is a word with a broader meaning than sovereignty:

Other hypernyms of sovereignty include authorisation, authority, authorization, dominance, potency.

sovereignty (noun)	say-so (noun)
the authority of a state to govern another state	the power or right to give orders or make decisions
government free from external control	an authoritative declaration
royal authority; the dominion of a monarch	one chap's arbitrary assertion