geography examples

shortest capital city names

Lima
Kyiv
Rome
Baku
Doha
Lome
Riga
Oslo
Juba
Dili
Male
Bern
Suva
Apia

(largest to smallest, approx, 10M down to 40K.

Five letters:

Seoul
Cairo
Dhaka
Paris
Hanoi
Amman
Kabul
Sanaa
Accra
Minsk
Quito
Rabat
Sofia
Abuja
Tunis
Dakar

Source

simplemaps: world-cities csv (where .capital = 'primary')