1) Adventurer 2) Explorer 3) Potholer 4) Speleologist 5) Spelunker 1) Potholer 2) Speleologist 3) Spelunker 
speleologist, spelaeologist Someone who specializes in the scientific study of caves and other karst (landscape of distinctive dissolution patterns often marked by underground drainages) features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorp...