Day of rest and Re-creation

Day of rest noun - A day set aside for rest.

Re-creation and day of rest are semantically related In some cases you can replace phrase "Re-creation" with "Day of rest", this phrases are similar.

Re-creation noun - The act of creating again.

Day of rest and re-creation are semantically related in planned time spent not working topic. Sometimes you can use "Day of rest" instead a noun phrase "Re-creation".