The two crossword solutions for the term 'Neighbor of Brazil (abbr.)' are URU (3 letters) and BOL (3 letters). Uruguay, or URU, is a small country located in South America, bordered by Brazil to the north and Argentina to the west and south. Bolivia, or BOL, is also a South American country, located to the west of Brazil and to the south of Peru and Chile. Both Uruguay and Bolivia are neighbors of Brazil.