Set up and Set in motion

Set up verb - To arrange something in a certain spot or position.

Set in motion and set up are semantically related In some cases you can use "Set in motion" instead a verb "Set up".

Set in motion verb - Get going; give impetus to.

Set up and set in motion are semantically related in start topic. Sometimes you can use "Set up" instead a verb phrase "Set in motion", if it concerns topics such as begin, initiate, create.