Coterminous (adjective)

1. Having the same boundaries or extent.
2. Coinciding in time or duration.
3. Having the same limits or scope.

Origin:

Derived from the latin word "coterminus" meaning "sharing a boundary".

Examples:

1. The two properties were coterminous, sharing the same boundary.
2. The terms of the contract were coterminous with the completion of the project.
3. The two departments were coterminous in their goals and objectives.
4. The two countries had coterminous borders that were not clearly defined.
5. The two events were coterminous in time, happening at the same time.