Isthmus | Strait |
It is a narrow body of land connecting two larger landmasses with water on both sides. | It is a narrow body of water connecting two larger water bodies. This water body is navigable and acts as an important shipping route. |
For example, the Isthmus of Panama joins North America with South America. To its west is the Pacific Ocean and to its east is the Atlantic Ocean. | For example, the Palk Strait is a strait between Tamil Nadu and northern Sri Lanka. It connects the Bay of Bengal with the Palk Bay. |