Gnomon and Stopwatch

Gnomon noun - Indicator provided by the stationary arm whose shadow indicates the time on the sundial.

Stopwatch and gnomon are semantically related in device that tells time topic. In some cases you can use "Stopwatch" instead a noun "Gnomon".

Stopwatch noun - A timepiece that can be started or stopped for exact timing (as of a race).

Gnomon and stopwatch are semantically related in device that tells time topic. You can use "Gnomon" instead a noun "Stopwatch".