The capital of Asturias is Oviedo, which is a 6-letter word. The second solution is SANA, which is a 4-letter word. Oviedo is the largest city and administrative centre in the autonomous community of Asturias in northern Spain. It is also the historical capital of the Kingdom of Asturias. SANA is an acronym for the Spanish phrase 'Sociedad Anónima de Navegación Aerea', which translates to 'Air Navigation Company'.