"Stink ball" is a slang term used to describe a bad odor or something unpleasant. There are several synonyms for this term, depending on the context in which it is used. Some common alternatives include "foul ball," "unpleasant aroma," "offensive scent," "stench," "reek," "thick smell," "bad fragrance" and "malodour." These synonyms can be used interchangeably in various settings to describe bad smells or things that are unpleasant. Other related words include "stenchy," "whiffy," and "funky," all of which describe unpleasant, often pungent odors. When it comes to describing odors, these synonyms provide a variety of options to choose from depending on the situation.