What does quagmire mean? an expanse of short grass

a soft boggy area of land

What does tableland mean? a valley

a plateau

What does rillet mean? a sand dune

a very small stream

What does isthmus mean? a narrow strip of land with sea on either side

a treeless grassy plain

What does erg mean? a deep inlet between high cliffs

an area of shifting sand dunes

What does sowback mean? a low ridge of sand

a long mountain ridge with steep sides

What does seif mean? a fertile spot in a desert

a sand dune

What does pocosin mean? an area of low, swampy ground

a point of high land jutting out to sea

What does llano mean? a wooded area

a treeless grassy plain

What does fjord mean? a deep inlet between high cliffs

a long mountain ridge with steep sides