HH

1. His or Her Highness
2. His Holiness

HH or 2H

Very hard (on lead pencils)

• lithoing
• litholapaxies
• litholapaxy
• litholatries
• litholatrous
• litholatry
• lithologic
• lithological
• lithologically
• lithologies
• lithologist
• lithologists
• lithology
• lithomancies
• lithomancy
• lithomarge
• lithomarges
• lithonthryptic
• lithonthryptics
• lithontriptic
• lithontriptics
• lithontriptist
• lithontriptists
• lithontriptor
• lithophagous