Speleotherapy refers to the therapeutic use of caves or mines for the treatment of respiratory or skin conditions. There are several synonyms that can be used interchangeably with speleotherapy. One such term is "cave therapy," which involves similar procedures to speleotherapy, where patients are exposed to the underground environment for therapeutic benefits. "Salt therapy" is another synonym for speleotherapy as it involves inhaling salt particles, which have been known to alleviate respiratory problems. "Subterraneotherapy" is also an apt synonym for speleotherapy, as it refers to any form of therapy that takes place in underground conditions. Overall, speleotherapy is a popular natural therapy with several synonyms that describe it.