Lustrum and Pentangle

Lustrum noun - A ceremonial purification of the Roman population every five years following the census.

Pentangle and lustrum are semantically related in five of something topic. In some cases you can use "Pentangle" instead a noun "Lustrum".

Pentangle noun - A star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon.

Lustrum and pentangle are semantically related in five of something topic. You can use "Lustrum" instead a noun "Pentangle".