Cairn and Dolmen

Cairn noun - A mound of stones piled up as a memorial or to mark a boundary or path.

Dolmen and cairn are semantically related. In some cases you can use "Dolmen" instead a noun "Cairn".

Dolmen noun - A prehistoric megalithic tomb typically having two large upright stones and a capstone.

Cairn and dolmen are semantically related. Sometimes you can use "Cairn" instead a noun "Dolmen".