troglodyte

1. One who lives in solitude (synset 110192120)
   is a type of: lone hand, lone wolf, loner - a person who avoids the company or assistance of others
   specific instances: john the baptist, st. john the baptist - (New Testament) a preacher and hermit and forerunner of Jesus (whom he baptized); was beheaded by Herod at the request of Salome
   same as: hermit, recluse, solitary, solitudinarian
2. Someone who lives in a cave (synset 109922184)
   is a type of: primitive, primitive person - a person who belongs to an early stage of civilization
   same as: cave dweller, cave man, caveman

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