Mental anguish is a term used to describe intense emotional distress or suffering. HEARTACHE, with nine letters, is a term often used to describe the pain of loss or disappointment. ANGST, with five letters, is a German word used to describe a feeling of anxiety or dread. DOLOR, with five letters, is a Latin word used to describe physical or mental pain. Together, these three words can be used to describe the intense emotional suffering associated with mental anguish.