The capital of Finland is Helsinki, which has 8 letters. Eero is a 4 letter word associated with Finland, as it is the first name of the Finnish architect and designer Eero Saarinen. Estonia is a 7 letter word associated with Finland, as it is a neighboring country. Suomi is a 5 letter word associated with Finland, as it is the Finnish word for Finland. Finally, Neva is a 4 letter word associated with Finland, as it is the name of a river that flows through St. Petersburg, Russia and Helsinki, Finland.