A landform with a rounded top that is lower and less steep than a mountain is called a hill.

Here's a breakdown:

* Mountains: Have a pointed or rounded peak, are significantly higher than hills, and are often formed by tectonic activity.

* Hills: Are lower than mountains, with a rounded top and gentler slopes. They can be formed by various processes like erosion, volcanic activity, or tectonic uplift.

Let me know if you have any more questions!