There are several synonyms for the term "kitty box" that pet owners may use. One of the most common phrases is "cat litter box," which refers to the container that holds the absorbent material that cats use for their waste. Other terms may include "cat box," "litter pan," "sandbox," "feline toilet," "kitty litter tray," or simply "litter box." The specific terminology used may vary depending on a pet owner's preference or geographical location, but they all refer to the same essential item that provides a private and hygienic place for cats to relieve themselves.