Well-pitched is a term used to describe a sound that has been accurately tuned and on-key. It is often used to describe the sound of a musical instrument or voice that has been tuned to the correct pitch. Tuned is a 5 letter word meaning to adjust the pitch of a sound, while onkey is a 5 letter word meaning to be in harmony with the key of a piece of music. Together, these two words describe the term well-pitched, which is a sound that is accurately tuned and on-key.