* Endoscope: A medical instrument used to view the inside of the body.
* Microscope: An instrument that uses lenses to magnify small objects.
* Telescope: An instrument that uses lenses or mirrors to view distant objects.
* Periscope: A device used to view objects above the horizon, especially from a submarine.
* Stethoscope: A medical instrument used to listen to the sounds of the heart and lungs.
* Bioscope: An obsolete term for a motion picture projector.
It's important to note that some of these words have other meanings as well, but the prefix "scope" usually refers to the instrument's ability to view or examine something.