Islandchain

3 clues
Florida keys, e.g.
The West Indies, e.g.
The Aleutians, for one
Similar answers:
Abcislands
Adieuoahuisland
Adventureisland
Alcatrazisland
Aleutianisland
Aleutianislands
Allislands
Amityisland
Angelisland
Ballandchain
Bandchain
Bearisland
Bedloesisland
Bigisland
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