A school of small glittering fish swam by.
The divers encountered a huge school of mackerel.
Word: "school"
the same meaning

Dogs should be kept under restraint.
Legal restraints.
Word: "restraint"
different meanings

The power of his love saved her.
The deterrent power of nuclear weapons.
Word: "power"
the same meaning

The most moving scene is the final one, where he realizes he has wasted his whole life.
The first act has three scenes.
Word: "scene"
the same meaning