Open up and Set in motion

Open up verb - Cause to open or to become open.

Set in motion and open up are semantically related in begin topic. In some cases you can use "Set in motion" instead a verb "Open up", when it comes to topics like create.

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

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