Observer and Signalman

Observer noun - Someone who sees or watches something.

Signalman and observer are semantically related In some cases you can use "Signalman" instead a noun "Observer".

Nearby Words: observe, observation, observance, observant, observed

Signalman noun - A railroad employee in charge of signals and point in a railroad yard.

Observer and signalman are semantically related in guard topic. Sometimes you can use "Observer" instead a noun "Signalman".