Communication:
* Telephone: A device for transmitting sound over a distance.
* Telegraph: A system for transmitting messages over long distances using electrical signals.
* Telepathy: Communication between minds without using the senses.
* Telemetry: The transmission of data over long distances.
* Telepresence: The feeling of being present in a remote location through technology.
Other:
* Telescope: An instrument for viewing distant objects.
* Television: A system for transmitting and receiving moving images and sound.
* Telekinesis: The supposed ability to move objects with the mind.
* Teleology: The study of purpose or design in nature.
* Telecaster: A brand of electric guitar.
Let me know if you want to explore more words with "tele" in them!