Go away and Go to sleep

Go away verb - Move away from a place into another direction.

Go to sleep and go away are semantically related in retire topic. In some cases you can use "Go to sleep" instead a verb "Go away", when it comes to topics like leave a place or responsibility.

Go to sleep verb - Prepare for sleep.

Go away and go to sleep are semantically related in retire topic. Sometimes you can use "Go away" instead a verb phrase "Go to sleep", if it concerns topics such as leave a place or responsibility.