The word "demark" has several synonyms that can be used depending on the context and meaning of the word. Some of the common synonyms for "demark" include delimit, define, determine, bound, separate, and mark off. Each of these words signifies the action of setting a boundary or limit for something or someone. For example, if a property owner wants to "demark" the limits of their land, they can use various methods to "define" or "mark off" the boundaries. Similarly, a country may "demark" its border with physical or legal means, such as fences or treaties, to "delimit" or "separate" its territory from other countries. Overall, the choice of synonym depends on the particular context and the intended meaning of the word.