An isolated hill is a hill that stands alone, separated from any other hills or mountains. It's essentially a hill that exists on its own, surrounded by a lower elevation landscape like a plain, valley, or plateau.

Here are some other terms for an isolated hill:

* Monadnock: This term is often used for an isolated hill that rises above a relatively flat plain.

* Butte: This term is typically used for a hill with steep, often vertical sides and a flat top.

* Mesa: This term is similar to "butte," but mesas are larger and have a wider, more expansive flat top.

How isolated hills are formed:

Isolated hills can form in a variety of ways, including:

* Erosion: Hills can be isolated by the erosion of surrounding land, leaving the hill as a remnant.

* Volcanic activity: Volcanic cones can form isolated hills.

* Tectonic uplift: Isolated hills can be formed by the uplift of a small area of land.

Examples of isolated hills:

* Mount Katahdin in Maine, USA, is a monadnock that rises above the Maine highlands.

* Table Mountain in South Africa is a mesa that stands above the surrounding plain.

* Shiprock in New Mexico, USA, is a butte that was formed by volcanic activity.

Isolated hills are often notable features in a landscape, offering a unique perspective and potential for scenic views. They also provide important habitats for plants and animals.