A moral compass is a person's inner guide for distinguishing right from wrong. However, there are various other synonyms for the phrase "moral compass" that can be used interchangeably. One such phrase is "ethical compass," which refers to a person's sense of ethics or principles. "Conscience" is another synonym that is used to refer to a person's inner voice that guides them towards good or bad actions. "Value system" and "moral code" are also synonymous with "moral compass" as they both refer to the set of values and principles that a person lives by. Lastly, "integrity" is another term closely associated with a person's moral compass, referring to their adherence to their principles in the face of temptation or pressure.