Foul smelling is a term that describes an unpleasant or offensive odor. However, there are several antonyms or opposite words that can be used to describe smells that are pleasant and refreshing. Some of these antonyms include fragrant, pleasant, delightful, sweet-smelling, refreshing, and aromatic. Fragrant implies a rich, strong, and pleasing scent, while pleasant suggests a mild and agreeable odor. Delightful refers to a smell that is pleasing to the senses and creates a feeling of happiness. Sweet-smelling implies a fragrance that is sugary and gentle, while refreshing describes a scent that is cool and invigorating. Finally, aromatic describes a smell that is intense, spicy, and flavorful. These words can be used to describe a wide variety of smells, ranging from flowers to herbs and spices.