"Settled one's differences" is a phrase that is commonly used when two parties come to an agreement or understanding after having a disagreement. There are several alternative phrases that can be used interchangeably with the phrase "settled one's differences." These include "resolved their disputes," "reconciled their conflicts," "patched up their disagreements," "made amends," "buried the hatchet," "found common ground," "amended their relations," "mended fences," and "sorted out their issues." All of these phrases embody the idea of two parties coming together to find a solution or to mend a relationship after a period of disagreement or conflict.