How many letters does the top answer for “a group of islands in the west indies” have?

The most common answer is antilles (8 letters).

Crossword clue: a group of islands in the west indies

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

antilles 8 letters wn-def

a group of islands in the West Indies

an island in the west indies 75% similar → haiti, hispaniola

island in west indies 75% similar → tobago