protectorate vs dominion

protectorate and dominion both are nouns.

Word	Noun	Adjective	Verb	Adverb
protectorate	Yes	No	No	No
dominion	Yes	No	No	No

As nouns, dominion is a hypernym of protectorate; that is, dominion is a word with a broader meaning than protectorate:

protectorate: a state or territory partly controlled by (but not a possession of) a stronger state but autonomous in internal affairs; protectorates are established by treaty
dominion: a region marked off for administrative or other purposes

Other hypernyms of protectorate include district, territorial dominion, territory.

protectorate (noun)	dominion (noun)
a state or territory partly controlled by (but not a possession of) a stronger state but autonomous in internal affairs; protectorates are established by treaty	a region marked off for administrative or other purposes
	dominance or power through legal authority