Set down and Sit down

Set down verb - To cause to sit down.

Sit down and set down are semantically related in land topic. In some cases you can use "Sit down" instead a verb "Set down", when it comes to topics like arrive.

Sit down verb - Take a seat.

Set down and sit down are semantically related in land topic. You can use "Set down" instead a verb "Sit down", if it concerns topics such as arrive.