Fly down and Sit-down

Sit-down and fly down are semantically related. In some cases you can replace phrase "Sit-down" with "Fly down", this terms are similar.

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

Fly down and sit-down are semantically related. Sometimes you can use "Fly down" instead a verb phrase "Sit-down".