Cold feet and Cold sweat

Cold feet noun - Timidity that prevents the continuation of a course of action.

Cold sweat and cold feet are semantically related In some cases you can use "Cold sweat" instead a noun phrase "Cold feet".

Cold sweat noun - The physical condition of concurrent perspiration and chill; associated with fear.

Cold feet and cold sweat are semantically related in anxiety topic. You can use "Cold feet" instead a noun phrase "Cold sweat", if it concerns topics such as alarm.