Horography refers to the art or science of constructing sundials or time-measuring instruments. There are several synonyms for the word horography, including gnomonics, timekeeping, and chronometry. Gnomonics specifically deals with the creation of sundials, while timekeeping involves measuring and recording time through various means such as clocks and watches. Chronometry is the study and measurement of time using accurate and precise techniques, including atomic clocks and other high-tech devices. Horology is another synonym, which refers to the science of timekeeping and the art of making timepieces such as watches and clocks. All of these terms relate to the concept of measuring and keeping track of time, whether it be through ancient methods or modern technology.