Small hills are called hummock's
hillock
The low ground between two hills is called a valley. Valleys are typically formed by erosion from water or ice flowing between the hills over a long period of time.
A low lying land between hills or mountains is called a valley
ridge
Narrow deep valleys are sometimes called canyons. Or a small valley riginally worn away by running water and serving as a drainageway after prolonged heavy rains is called a Gully.
Argos has a flat land geography. Small hills.
butthead
tablelands
The hills were called Big Round Top and Little Round Top and are the most famous of the hills at Gettysburg.
Dunes.
mesas
The low ground between two hills is called a valley. Valleys are typically formed by erosion from water or ice flowing between the hills over a long period of time.
Valley. A valley is usually found between two ranges of hills rather than between two hills. The small "valley" between two hills is more properly called a "coll".
The small hills that overlook Boston Harbor are called the Boston Harbor Islands. These islands include popular destinations such as Spectacle Island and Georges Island, offering scenic views of the harbor and the city skyline.
hillock
Tallahassee is known as the city of "Seven Hills". Rome, Italy is also known as the City of Seven Hills. It's location is on seven hills.
Abyssal hills are small hills that rise from the abyssal plain, which is the floor of the ocean.
Terrace farming.