A Rhonchus is a type of lung sound that is heard when a person breathes. It is usually caused by air passing through narrowed or blocked airways, and is often associated with conditions such as asthma, bronchitis, and COPD. The term rhonchus is derived from the Greek word for 'SNORE' and is related to the term rale, which is another type of lung sound. SNORE and rale are both five and four letter words respectively, which can be used to describe a rhonchus.