"The end you are looking for is the change in relationship between the student and teacher."

They mean not quite the same thing, but they're in relationship with each other.

Near has been in a relationship with a man since 1994.

She says a part of her really wants to be in a relationship with him.

Financial problems are also a very hard time in a relationship.

He and the woman seem to be in a relationship.

Had he been in a relationship of his own at the time?

He can no longer see himself in a serious relationship with a white woman.

In a new relationship, you don't know much about the other person.

She had found exactly the same thing in her relationship with him.