Come back and Re-start

Come back verb - To become healthy and strong again after illness or weakness.

Re-start and come back are semantically related In some cases you can replace phrase "Re-start" with "Come back", this terms are similar.

Re-start verb - Take up or begin anew.

Come back and re-start are semantically related in begin again topic. Sometimes you can use "Come back" instead a verb phrase "Re-start".