Groups of islands are called "archipelagoes", for example, the Galapagos islands.
An archipelago is a group or cluster of islands.
An archipelago is a chain or cluster of islands.
You likely mean either the Aleutian Islands or Alexander Archipelago.
The Aleutian Islands form the longest archipelago in the U.S. state of Alaska. This chain of islands extends about 1,200 miles (1,900 km) from the Alaska Peninsula to the Kamchatka Peninsula in Russia.
Home Islands
Archipelago
Galapagos Islands
Chatham Islands Chatham Islands
A chain of islands is often called an "archipelago".
qwreefer
An archipelago is simply a chain of islands. Hawaii would qualify as one.