Rotary displacement refers to a type of motion that involves circular movement around an axis. There are several synonyms for this term that can be used interchangeably depending on the context. These include rotational displacement, circular displacement, angular displacement, and curved displacement. Each of these synonyms describes the same type of motion but may be more appropriate in certain situations. For example, rotational displacement is often used in the context of rotating machinery, while angular displacement may be used more broadly to describe any type of circular motion. Regardless of the term used, rotary displacement is a key concept in many fields including engineering, physics, and mechanics.