Eau de Cologne is a term used in perfumery to describe a type of light and citrusy scent. The antonyms for this term would be fragrances that are heavy, musky, and earthy. Some examples could be oud, which is a strong and woody scent derived from agarwood, or patchouli, which has an earthy and musty aroma. Other antonyms for Eau de Cologne could include scents that are spicy and exotic, such as saffron or cardamom, or floral and sweet, like jasmine or rose. Ultimately, the opposite of Eau de Cologne would be any scent that is not light, fresh, and citrusy.