Gridlock and Sit-down

Gridlock noun - A point in a struggle where neither side is capable of winning or willing to give in.

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

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

Gridlock and sit-down are semantically related in stoppage topic. You can use "Gridlock" instead a noun phrase "Sit-down".