Here's a breakdown:
* Strait: A narrow waterway connecting two larger bodies of water.
* Lagoon: A shallow body of water separated from a larger body by a barrier island or reef.
* Fiord (or Fjord): A long, narrow, deep inlet of the sea between high cliffs, especially in Norway.
* Tributary: A stream or river that flows into a larger river or body of water.
* Harbor: A sheltered body of water where ships can anchor safely.
* Channel: A narrow waterway connecting two larger bodies of water, often used for navigation.
While each word has its own specific definition, they all share the characteristic of being geographic features that involve water.