What word describes an explore who was granted the right to and establish settlements in Americas by Spain?

The word to describe an explorer who was granted the right to establish settlements in the Americas by Spain is "conquistador." Conquistadors were Spanish explorers and soldiers who played a significant role in the Spanish colonization of the Americas during the 15th and 16th centuries. They were often driven by the desire for wealth, land, and religious conversion. Conquistadors such as Hernan Cortes and Francisco Pizarro led expeditions that resulted in the conquest of vast territories and the establishment of Spanish rule in the Americas.