We don't have synonyms for dombes yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are domes, combes and bombes.
(N) :
an area in eastern France, once an independent municipality, formerly part of the province of Burgundy, and now a district comprised in the department of Ain, and bounded on the west by the Saône River, on the south by the Rhône, on the east by the Ain and on the north by the district of Bresse.
(N) :
an area in eastern France, once an independent municipality, formerly part of the province of Burgundy, and now a district comprised in the department of Ain, and bounded on the west by the Saône River, on the south by the Rhône, on the east by the Ain and on the north by the district of Bresse.