cave    isenga, ubuhūku
(of wild animals) ubuvumo
En-En dictionary 
isenga (ama-)     5  class 5
singular: i-,iri-
plural: ama-
  
1. cave, 2. perfume, nice-smelling oil
ubuhuku     8  class 8
singular: ubu-
  
(no pl.) cave, den (of wild animals, as in rocks)
ubuvumo   8  class 8
singular: ubu-
  
(no pl.) cave, den (as of wild animal, in rocks)