1. drilling mud a mixture of clays and chemicals and water
  2. drilling bit a bit used in drilling for oil
  3. drilling fluid a mixture of clays and chemicals and water
  4. drilling rig rig used in drilling for oil or gas
  5. drilling the act of drilling
  6. drilling pipe a series of tubes (joined by screwed collars) that connect a drilling platform to the drilling bit; rotates the bit and supplies drilling mud
  7. Trilling United States literary critic (1905-1975)
  8. trilingual using or knowing three languages
  9. thrilling causing a surge of emotion or excitement
  10. trolling angling by drawing a baited line through the water
  11. rolling mill steel mill where metal is rolled into sheets and bars
  12. raving mad talking or behaving irrationally
  13. darling a special loved one
  14. trailing the pursuit by following tracks or marks they left behind
  15. darling pea either of two Australian plants of the genus Swainsona that are poisonous to sheep
  16. trillionth the ordinal number of one trillion in counting order
  17. twirlingly doing twirls
  18. trailing edge the rear edge of an airfoil
  19. dwelling housing that someone is living in
  20. Darling an Australian river; tributary of the Murray River