Fetidity describes a particularly strong and unpleasant smell - but what other words might you use to express the same idea? One option could be 'stench' - this connotes a strong, overwhelming smell that is often associated with decomposition. Alternatively, 'reeking' might be used to describe an unpleasant and pungent odor. Other options could include 'stenchiness', 'malodorousness', 'foulness' or 'funk'. Ultimately the choice of word will depend on what exactly is being described - for instance, a particularly bad cigar smell might be described as 'acrid' or 'harsh' rather than simply 'fetid'. Whatever word is used, it should convey the sense of an intense, unpleasant and overpowering aroma.