Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun speleology

2 senses of speleology

Sense 1
speleology, spelaeology -- (the scientific study of caves)
       => geology -- (a science that deals with the history of the earth as recorded in rocks)

Sense 2
speleology, spelaeology -- (the pastime of exploring caves)
       => avocation, by-line, hobby, pursuit, sideline, spare-time activity -- (an auxiliary activity)