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)

• Equisetales
• equisetic
• equisetiform
• Equisetinae
• equisetum
• equisetums
• equitability
• equitable
• equitableness
• equitablenesses
• equitably
• equitant
• equitation
• equitations
• equites
• equities
• equity
• equity finance
• equity release
• equivalence
• equivalences
• equivalencies
• equivalency
• equivalent
• equivalently