Osphresiophobia is defined as the fear of bad smells. There are several synonyms for osphresiophobia that are used interchangeably such as olfactophobia, which is the fear of odors or smells, and cacosmia, which refers to a strong aversion to unpleasant smells. Another commonly used synonym is malodorophobia, meaning the fear of unpleasant or offensive odors. Other synonyms include hyperosmia, the fear of strong and overpowering smells, and parosmia, the fear of distorted or altered smells. These synonyms all refer to the same fear of smells and can be used to describe the uncomfortable and unwarranted aversion to odors that some people may experience.