Arc is a word that typically brings to mind the image of a curved shape or trajectory. However, there are several synonyms for the word that can be used in place of "arc" to add variety and color to your writing. Some possible synonyms include curve, bend, arch, semicircle, crescent, bow, archway, vault, and span. Each of these words embodies a unique quality that can convey different nuances depending on context. For example, "arch" might evoke a regal, formal quality, while "curve" might suggest a more organic, fluid shape. By using synonyms like these, you can add depth and nuance to your writing, helping to keep your content fresh and engaging.