There are several synonyms for the phrase "showed mercy" that can be used interchangeably in various contexts. Some of these words include compassion, forgiveness, leniency, clemency, gentleness, and kindness. Each of these words describes an act of grace or forgiveness shown towards a person or situation where harshness or punishment could have been expected. For instance, a judge may show leniency towards a defendant who shows remorse for their actions. A friend may show compassion towards another who is struggling with emotional turmoil. Ultimately, all these synonyms refer to the act of extending grace towards someone who may not have necessarily deserved it.