The term 'something worn as a winter warmer' can be summarized by the seven-letter word 'earmuff'. Earmuffs are a type of headgear that is designed to keep the ears warm during cold weather. They typically consist of two circular bands connected by a headband, with each band containing a cushion filled with insulating material. Earmuffs are often made of fur, wool, or synthetic materials, and are a popular winter accessory.