The word "smelliest" is an adjective that describes something with a strong and unpleasant odor. There are several synonyms for this term, including "foul-smelling," "rank," "pungent," "stench-filled," "malodorous," "noxious," and "stinky." These words convey the same meaning as "smelliest" but may be more specific in their description of the scent. For instance, "pungent" refers to a sharp, intense smell, while "malodorous" suggests an offensive odor that can cause discomfort. Using synonyms can expand your vocabulary and provide a more vivid and descriptive language that enhances the reader's experience of the text.