Downswing refers to a negative trend or decline in a particular situation. The word can be replaced with several synonyms, such as slump, decline, decrease, drop, dip, and deterioration. A slump refers to a sudden and significant fall in something such as business, economy, or morale, while decline is a gradual decrease over time. Decrease refers to a reduction in quality or quantity of something. Drop refers to an abrupt and noticeable fall in something. Deterioration is a steady decline in overall quality or condition and is often used with health, environment, etc. Synonyms are great tools to create more dynamic writing and avoid repetition.