General words:
* Phone: The most obvious example, it literally means "sound"
* Phonics: The method of teaching reading by associating letters with their sounds
* Phonetic: Relating to the sounds of speech
* Phonology: The study of speech sounds
* Microphone: A device that converts sound into electrical signals
* Telephone: A device for transmitting and receiving sound over a distance
* Phonograph: A device for recording and reproducing sound
* Euphony: A pleasing combination of sounds
* Cacophony: A harsh and unpleasant combination of sounds
Words related to music:
* Phoneme: A basic unit of sound in a language
* Polyphony: Music with multiple independent melodic lines
* Homophone: A word that sounds the same as another but has a different meaning
* Symphonic: Relating to a symphony, a large musical work for an orchestra
* Phonological: Relating to the study of speech sounds
* Phonetician: A specialist in the study of speech sounds
Words related to the human body:
* Phonocardiogram: A recording of heart sounds
* Pharyngitis: Inflammation of the pharynx (throat)
* Phonetics: The study of speech sounds
* Phonosurgery: Surgery related to the vocal cords
This is not an exhaustive list, but it gives you a good starting point for understanding words with the Greek root "phone".