The Athabascan people call the tallest peak in North America Denali, meaning "the tall one." In the 1800s, White settlers called the same peak Mount McKinley after the US president. Which word describes the study of the terms Denali and Mount McKinley ?

Toponymy is the study of place names and their origins or meanings. Denali and Mount McKinley are two names for the same mountain, so studying those terms is toponymy. Topography describes the physical features of a place, not its names.

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