Mayday and Tocsin

Mayday noun - An internationally recognized distress signal via radiotelephone (from the French m'aider).

Tocsin and mayday are semantically related. in indication topic. In some cases you can use "Tocsin" instead a noun "Mayday", when it comes to topics like warning.

Tocsin noun - An object intended to give public notice or warning.

Mayday and tocsin are semantically related. Sometimes you can use "Mayday" instead a noun "Tocsin".