The term "boonies" is commonly used to refer to remote and rural areas that are far from urban centers. However, there are some other synonyms that can be used to express the same idea. For instance, the word "outback" is another term that conveys the sense of isolation and wilderness. "Hinterland" is another synonym that refers to the remote areas that are located inland. "Backcountry" is also a term that can be used to describe remote and rugged areas that are not easily accessible. Lastly, "wilds" is another synonym that is used to describe the untamed and unpopulated regions. All these words can be used interchangeably with "boonies" to describe remote, isolated and rural regions.