Miners, among others, are people that work underground
Someone who works under you, or for you, may be called an employee or subordinate. Still, they should always be considered a colleague.
selfworker
keelman
Mole
If they are not under your name then there is no reason why you would need to.
A ward.
All potatoes grow underground.
Water that is found under water is GROUND WATER 100% ♥Ü☼
Animal trainer or lion tamer.
an exterminator. but if you don't kill them you are a veterinarian
Cruciverbalist can refer to someone who designs or attempts to solve crossword puzzles.
The name Shamaz means someone who replaces another, or someone under God's protection. It is a Hebrew name that is a variant of the name James.