Bad breath is a common problem amongst people across the world. It can be caused due to various reasons like poor oral hygiene, smoking, certain medications, and even some medical conditions. To describe this not-so-pleasant condition, there are many synonyms used in the English language. Some of the commonly used synonyms for bad breath include halitosis, fetor oris, oral malodor, breath odor, and stink breath. Each of these terms implies the same meaning, however, they are used in different contexts and situations. Regardless of the synonym used, it is important to address bad breath to maintain good oral health and interpersonal relationships.