The term 'MOLE HOLE' is a combination of two words: 'MOLE' and 'HOLE'. The word 'MOLE' refers to a small burrowing mammal that lives underground, while the word 'HOLE' refers to an opening or cavity in the ground. The crossword solution for this term is 'BURROW', which is a noun that describes the tunneling activity of moles. Burrows are typically dug by animals such as moles, rabbits, and foxes, and are used as a form of shelter and protection from predators.