When you need to describe being outdoors, there are several synonyms to choose from that can add variety and interest to your writing. Some common synonyms for "out of doors" include outside, in the open air, alfresco, and under the sky. Other options might include in the wilderness, in nature, in the elements, or in the great outdoors. These synonyms can be used interchangeably and can help to paint a more vivid picture in the reader's mind. Whether you are writing about camping, hiking, or simply enjoying a summer day, there are plenty of words to describe the experience of being outside.