dominion vs possession

dominion and possession both are nouns.

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

As nouns, possession is a hyponym of dominion; that is, possession is a word with a more specific, narrower meaning than dominion:

dominion (noun)	possession (noun)
a region marked off for administrative or other purposes	anything owned or possessed
dominance or power through legal authority	the act of having and controlling property
	(sport) the act of controlling the ball (or puck)
	the trait of resolutely controlling your own behavior
	a territory that is controlled by a ruling state
	a mania restricted to one thing or idea
	being controlled by passion or the supernatural