1) Argentinian hill 2) Argentinian peakain 3) Argentinian mountain 4) Argentinian prominenceain 5) Chilean prominenceain 6) Chilean peakain 7) Chilean hill 8) Chilean mountain 9) Hill in Argentina 10) Hill of Argentina 11) Hill of Chile 12) Hill in Chile 13) Hill in South America 14) Mountain peak 15) Mountain in Chile Found on https://www.crosswordclues.com/clue/llullaillaco