"Fetid horehound" is a unique term that may not be familiar to everyone. However, there are several synonyms for this phrase that can better convey its meaning. Some alternatives include smelly horehound, stinking horehound, putrid horehound, foul-smelling horehound, and malodorous horehound. These synonyms accurately describe the pungent odor associated with horehound, which is a plant commonly used in traditional medicine. Whether you are a writer looking to vary your word choice or just curious about different ways to describe strong odors, these synonyms offer a range of options to suit your needs.