addendum /ə-denˈdəm/

1. A thing to be added, such as supplementary material to a book, etc
2. The distance between the centre and the outer edge of a tooth on a gear or of the thread of a screw (engineering)

• handicapping
• handicaps
• handicraft
• handicrafts
• handicraftsman
• handicraftsmen
• handicraftswoman
• handicraftswomen
• handicuffs
• handier
• handiest
• handily
• hand-in
• handiness
• handinesses
• handing
• hand in glove
• hand in hand
• hand-in-hand
• hand-ins
• hand it to someone
• handiwork
• handiworks
• handjar
• handjars