Bad odor is an unpleasant smell that can cause discomfort and embarrassment. If you want to avoid using the term "bad odor" repeatedly, there are several synonyms you can use instead. For example, the words "stench," "stink," "foul," and "reek" all refer to unpleasant odors. "Malodor" is another term that can be used to describe a bad smell. In addition, "putrid," "rank," and "fetid" are all synonyms for bad odor. Using synonyms can help you convey the same idea in different ways, adding variety to your vocabulary and avoiding repetition.