When looking for alternatives for the word "stale", there are several options available. "Musty" is a good option for describing something that has been sitting for too long and has developed an unpleasant smell. "Rancid" describes food that has gone bad and has a sour or putrid smell. For bread and other baked goods, the word "stodgy" can be used to describe something that is heavy and not fresh. "Moldy" is another good option for describing something that has gone bad and has developed mold. "Old-fashioned" can also be used to describe something that is no longer popular or current. Finally, "expired" can be used to describe a product that is no longer safe to use due to age or outdated ingredients.