Rufous-crowned is a term that refers to a bird species characterized by a reddish-brown colored crown. The term is specific to this particular species, but there are several synonyms that can be used to describe birds with a similar feature. For example, the term "cinnamon-capped" can be used to refer to birds with a reddish-brown colored cap. "Chestnut-crowned" is another term that can be used to describe birds with a similar crown color. Additionally, the term "rufous-headed" can be used to refer to birds with a reddish-brown colored head. These synonyms offer alternative ways to describe the physical features of birds beyond the specific term "rufous-crowned".