1. hell on earth any place of pain and turmoil
  2. heliport an airport for helicopters
  3. Hollander a native or inhabitant of Holland
  4. Hollerith United States inventor who invented a system for recording alphanumeric information on punched cards (1860-1929)
  5. linearity the property of having one dimension
  6. heavenward directed toward heaven or the sky
  7. hellhound the three-headed dog guarding the entrance to Hades
  8. heulandite a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium
  9. Leonardo Italian painter and sculptor and engineer and scientist and architect; the most versatile genius of the Italian Renaissance (1452-1519)
  10. halliard a rope for raising or lowering a sail or flag
  11. Leonard United States writer of thrillers (born in 1925)
  12. hilarity great merriment
  13. Hilbert German mathematician (1862-1943)
  14. lanyard a cord worn around the neck to hold a whistle, badge, etc.
  15. hollow-horned having horns that are hollow
  16. halfpennyworth the amount that can be bought for a halfpenny
  17. halberdier a guard who carries a halberd (as a symbol of his duty)
  18. halberd a pike fitted with an ax head
  19. halyard a rope for raising or lowering a sail or flag
  20. holler out shout out