HH

1. His or Her Highness
2. His Holiness

HH or 2H

Very hard (on lead pencils)

• adipose tissue
• adipose tissues
• adiposities
• adiposity
• adit
• adits
• adiós
• adj.
• adjacencies
• adjacency
• adjacent
• adjacent angles
• adjacently
• adjectival
• adjectivally
• adjective
• adjectively
• adjectives
• adjoin
• adjoined
• adjoining
• adjoins
• adjoint
• adjoints
• adjourn