The term TIMEKEEPER is used to describe someone who is responsible for keeping track of time. This can be done in a variety of ways, such as using a CLOCK (5 letters), WATCH (5 letters), SUNDIAL (7 letters), or CON (3 letters). Clocks and watches are the most common methods of timekeeping, with clocks being used to measure longer periods of time and watches being used to measure shorter periods of time. Sundials are an ancient form of timekeeping that uses the position of the sun to tell time. CON is an abbreviation for chronometer, which is a highly accurate timekeeper used in navigation.