a stopwatch is used for measuring time
stopwatch is timer. stopwatch is not timer. stop_watch is not way_to_measure_quick_time. stop_watch is way_to_measure_quick_time. stopwatch is old_device_for_measuring_time. watches is not devices_for_measuring_time. watch is mechanical_means_of_measuring_time. watch is not mechanical_means_of_measuring_time. stopwatch is not old_device_for_measuring_time. watches is devices_for_measuring_time.