General:
* Autograph: A person's own signature.
* Biograph: A biography.
* Cenotaph: A monument erected in memory of a person whose body is buried elsewhere.
* Crypτογραφ: A system for concealing information.
* Demograph: A statistical description of a population.
* Electrograph: A device that records electrical signals.
* Epitaph: An inscription on a tomb or monument.
* Graph: A diagram that shows a relationship between two or more sets of data.
* Heliograph: A device that uses sunlight to send signals.
* Historiograph: A history of historical writing.
* Iconograph: A description of images or symbols.
* Lithograph: A print made from a stone or metal plate.
* Logograph: A symbol representing a word or phrase.
* Monograph: A book or treatise on a single subject.
* Orthograph: The correct spelling of a word.
* Photograph: A picture produced by a camera.
* Psychograph: A device that is claimed to be able to record thoughts or emotions.
* Telegraph: A device for sending messages over long distances using electrical signals.
* Topograph: A detailed description of a place or region.
* Xenograph: A transplant from an animal of one species to an animal of another species.
Scientific:
* Aerograph: A device for recording air pressure.
* Astrograph: A telescope designed for photographing astronomical objects.
* Barograph: A device for recording atmospheric pressure.
* Cardiograph: A device for recording the electrical activity of the heart.
* Chronograph: A device for measuring time intervals.
* Electroencephalograph: A device for recording the electrical activity of the brain.
* Electrocardiograph: A device for recording the electrical activity of the heart.
* Geograph: A device for recording the position of objects on the Earth's surface.
* Hydrograph: A diagram showing the variation in the flow of a river or stream over time.
* Oscillograph: A device for recording the oscillations of a signal.
* Seismograph: A device for recording the vibrations of the Earth's surface.
* Spectrograph: A device for separating light into its different wavelengths.
Technical:
* Caligraph: A type of typewriter.
* Graphite: A form of carbon used in pencils and other applications.
* Micrograph: A photograph taken using a microscope.
* Stereograph: A pair of photographs that are viewed with a stereoscope to create a three-dimensional effect.
This list is not exhaustive, but it gives you a good starting point for exploring words ending with "-graph".