Synonyms of addendum

addendum

noun

ə-ˈden-dəm 

1

as in appendix

a part added at the end of a book or periodical

there's an addendum from the author to explain certain stylistic choices that she made

Synonyms & Similar Words

• appendix
• codicil
• afterword
• supplement
• epilogue
• documentation
• conclusion
• addition
• postscript
• coda
• sequel
• excursus
• accompaniment
• finale
• ending
• follow-up
• complement
• postlude
• rider
• allonge

Antonyms & Near Antonyms

• introduction
• preface
• foreword
• prologue

2

as in increase

something added (as by growth)

with each new addendum the list of demands simply got more absurd

Synonyms & Similar Words

• increase
• addition
• boost
• gain
• rise
• supplement
• increment
• raise
• accrual
• augmentation
• expansion
• uptick
• accretion
• proliferation
• plus
• step-up
• continuation
• accumulation
• appendix
• extension
• more
• collection
• complement
• assemblage
• gathering
• spike
• jump
• upturn
• accession
• uptrend
• run-up

Antonyms & Near Antonyms

• reduction
• decrease
• loss
• diminution
• decline
• abatement
• lowering
• depletion
• fall
• shrinkage
• decrement
• lessening
• deduction
• step-down
• diminishment
• subtraction
• falloff
• drop-off

Example Sentences

Recent Examples of addendum

But an addendum to that was that all support for the game, short of servers being shut off, was over. — Paul Tassi, Forbes.com, 7 July 2026

During discussions about elementary and middle school social studies curriculum, board members made addendums, including education about the horrors of communism, why the Second Amendment was created and how counterculture increased the rate of divorce. — Rachel Royster, Fort Worth Star-Telegram, 27 June 2026

While the Brooklynite was more of an addendum than a star in that book, its a delightful little drink and among the better things to make with a bottle of Jamaican rum. — Jeremy Repanich, Robb Report, 6 June 2026

Advertisement Blanche defended the tax term, which had been included in an addendum to the DOJ’s announcement of the fund and not separately announced. — Miranda Jeyaretnam, Time, 3 June 2026