The term "sigher" refers to an individual who sighs frequently due to sadness, frustration, or boredom. However, there are a variety of synonyms for "sigher" that can be used in different contexts. For example, a "moaner" is someone who constantly expresses their dissatisfaction or unhappiness with their surroundings or situation. Similarly, a "complainer" is someone who frequently expresses their grievances or disappointments. A "sulker" is someone who remains silent or withdrawn due to feeling upset or hurt. A "moper" is someone who is idle and unhappy, often lacking motivation or energy. Ultimately, there are many ways to describe someone who sighs frequently, depending on their specific traits and behavior.