Connecting strips of land (Var.)

• Panama Suez and Corinth
• Land mass connectors (Var.)
• Necks of land
• Continental connectors
• Panama and Suez, for two
• Necks in the water?
• Strips near the water
• Thin strips
• Strips in geography class

Wiktionary Word definitions in Wiktionary
n. (plural of isthmus English)