Amphoric is a word that is commonly used in medical terminology to describe a type of respiratory sound that resembles a metallic or hollow echo. However, there are several other synonyms that can be used to describe this sound, including tinny, resonant, echoing, cavernous, and booming. These words can all be used interchangeably with amphoric, depending on the context and the speaker's preference. No matter which word you choose, they all have a similar meaning and indicate the presence of a particular type of respiratory sound that can be heard in certain medical conditions, such as pneumothorax or bronchial obstruction.