* Opium by Yves Saint Laurent: A classic, iconic fragrance known for its spicy oriental notes.
* Omnia by Bvlgari: A line of fragrances with various scents, often featuring a mix of floral, woody, and spicy elements.
* Oud Wood by Tom Ford: A luxurious and popular unisex fragrance centered around the rich, smoky scent of oud.
* Orchid Soleil by Tom Ford: A warm, radiant floral fragrance.
* Orange Blossom by Jo Malone: A light and refreshing citrus floral fragrance.
* Only The Brave by Diesel: A masculine fragrance with woody and oriental notes.
* Oud Ispahan by Dior: Another luxurious oud fragrance, known for its rose and oud combination.
* Original Musk by Kiehl's: A classic and clean musk fragrance.
* Overture by Amouage: A complex and opulent fragrance with incense and smoky notes.