When we experience grief or sadness, we often express those emotions as sorrow over something. But there are several synonyms that can be used interchangeably depending on the situation and context. One possible option is sadness, which conveys a sense of emotional pain or distress. Melancholy is another synonym that suggests a profound sense of sorrow and pensive reflection. Heartache refers to a physical pain in the chest, much like a broken heart, caused by emotional distress. Regret emphasizes a sense of disappointment or shame over past actions or decisions. And finally, mourning describes an expression of sorrow for someone who has died.