Layoff and Sit-down

Layoff noun - The termination of the employment of an employee or a work force often temporarily.

Sit-down and layoff are semantically related In some cases you can use "Sit-down" instead a noun "Layoff".

Sit-down noun - A strike in which workers refuse to leave the workplace until a settlement is reached.

Layoff and sit-down are semantically related in halt topic. You can use "Layoff" instead a noun phrase "Sit-down", if it concerns topics such as stoppage.