In-version refers to the act of turning or changing something upside down or inside out. Synonyms for in-version include reversal, overturning, flipping, upending, toppling, capsize, and turnabout. In the medical field, inversion may also refer to a condition where the foot turns inward, and the opposite of that is eversion. Other synonyms for in-version can depend on the context; for example, in music, inversion refers to playing a song's melody backward, and in geometry, it refers to flipping a shape over a line. Whether you're trying to express an idea upside down or invert a situation, having a list of synonyms can help you communicate effectively.