Tortuosities refers to the act of twisting or turning in an irregular manner. Some common synonyms for tortuosities include meandering, winding, twisting, turning, and circuitous. These words are often used to describe roads, rivers or paths that follow a winding or curvy pattern. Other synonyms that can be used to describe something that is filled with twists and turns include labyrinthine, convoluted, sinuous, and serpentine. In medical terms, tortuosities can be used to describe the condition of twisted, curved or otherwise abnormally shaped blood vessels. Overall, tortuosities can be described using a variety of words and phrases, all of which convey the idea of something that is winding or twisting in an irregular manner.