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addendum Synonyms
Another word for addendum
Choosing another word for addendum that fits your sentence is easier when synonyms and similar words are paired with an exact noun definition and ranked by match strength.
• noun (Context 1)
An item of additional material, typically omissions or updates, added at the end of a book, contract, or other document.
Usage Example
"Both parties signed an appendix to the original lease agreement to extend the rental period by six months."
Strongest
appendix
supplement
Strong
postscript
codicil
rider
addition
annex
Weak
afterthought
Opposites of addendum
The opposite of addendum shifts depending on context. Common opposites include:
dedendum
omission
deletion
excision
Cite this Entry
Wordmom. (2026). Synonyms for Addendum. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/addendum