Cistern and Storage reservoir

Cistern noun - A sac or cavity containing fluid especially lymph or cerebrospinal fluid.

Storage reservoir and cistern are semantically related in reservoir topic. In some cases you can use "Storage reservoir" instead a noun "Cistern", when it comes to topics like storage tank.

Cistern and storage reservoir are semantically related in reservoir topic. You can use "Cistern" instead a noun phrase "Storage reservoir", if it concerns topics such as storage tank.