An inselberg, also called a monadnock, is a singular rock formation that appears on a more or less level plain. The most famous inselberg would be Uluru in Australia, but there are others around the world.
Inselberg originates from German--Inselberg, which means "island mountain". Geologist Wilhelm Bornhardt coined the word in 1900 when describing the many land features found in Eastern Africa.
Monadnock, or "smooth mountain" is thought to originate from the Abenaki, whose traditional territory is in the Eastern Canada and USA. In fact, there is a Mount Monadnock in New Hampshire.