When is a versatile word that denotes time, circumstance, and conditions. Synonyms for when include moment, duration, interval, occasion, while, point, period, and instance. These synonyms denote different aspects of time or situations depending on the context. Moment and point indicates a specific time frame. Duration and interval denote how long an event lasts. While and period refer to a phase, situation, or era. Instance and occasion indicate a specific occurrence. Using these synonyms for when can make your writing more varied and dynamic. Choosing the right synonym will make your writing more professional and expressive, and it will improve your readers' understanding.