Kilometers per hour (kph) is a standard metric unit for measuring speed. However, there are several other synonyms for kph that are frequently used in different contexts. One of the most common is "km/h," which is the abbreviation for kilometers per hour. Another synonym for kph is "kmph," which is shorthand writing for kilometers per hour. In the aviation industry, the standard term for speed is "knots," which refers to nautical miles per hour. Other synonyms for kph include "km/s," which stands for kilometers per second and is used in scientific calculations, and "km/min," which refers to kilometers per minute and is commonly used in navigation and driving speed calculations.