an isthmus joins two larger bodies of land, and a tombola joins an island to a mainland. But may be flooded at high tide.
A land bridge. An Isthmus.
A narrow strip of land such as this is called an isthmus.
border
Butt
The Bering Land Bridge
guessing you are doing this from dg wk 21, i am too...i got isthmus and it seems to be correct-- i have seen it on other sites.
Isthmus is the scientific name for the piece of land connecting two larger pieces of land. This could also be referred to as a land bridge.
land bridge
If you are talking about a piece of narrow land that sticks out into a body of water, then it is called a peninsula.
Beringia or the Bering Land Bridge
Bering land bridge
The isthmus of Panama.