Diademed is a word used to describe someone wearing a diadem, which is a type of crown. There are several synonyms that can be used to describe this same concept, such as crowned, adorned, bejeweled, and decorated. The word adorned is particularly useful when describing someone who is wearing a diadem or other decorative headpiece with jewels and other embellishments. Alternatively, the term bejeweled is a more specific synonym that emphasizes the use of precious stones and gems in the diadem. Finally, the term decorated can be used to describe any type of ornate headpiece, whether it is a diadem or some other type of crown-like accessory.