Signal and Secret code

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

Secret code and signal are semantically related. In some cases you can use "Secret code" instead a noun "Signal".

Nearby Words: signaled, signalize, signally, signalling, signaling

Secret code noun - A secret method of writing.

Signal and secret code are semantically related. Sometimes you can use "Signal" instead a noun phrase "Secret code".