How many letters does the top answer for “city in french chad” have?

The most common answer is ndjamena (8 letters).

Crossword clue: city in french chad

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

ndjamena 8 letters wd-fact-v3

the capital and largest city of Chad; located in the southwestern on the Shari river

city in french guiana 50% similar → apatou, cayenne, papaichton

city in french india 50% similar → pondicherry

city in french senegal 50% similar → saintlouis