Demense has various synonyms that can be used to express a similar meaning, depending on the context of the sentence. One such synonym is estate, which refers to a large piece of land used for the cultivation of crops or for other specific purposes. Property is another word that can be used to describe land owned by an individual or an entity. A third synonym for demense is domain, which refers to a territory controlled by a ruler or a sovereign state. Other synonyms include dominion, sphere and kingdom. All these words denote an area over which one has control or authority, and they can be used interchangeably with demense as appropriate.