ADDENDA Synonyms: 75 Similar and Opposite Words

addenda

noun

variants also addendums

plural of addendum

as in appendixes

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

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Antonyms & Near Antonyms

as in additions

something added (as by growth) with each new addendum the list of demands simply got more absurd

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of addenda 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 The lease addendums are a mandatory part of rental agreements across Arizona and the nation. — AZCentral.com, 4 Feb. 2026 The show is light on tech, but the accompanying images (video design by Stefano DeCarli) pour through as addendums to Felder’s puissant passion of Liszt’s Liebesträume or Beethoven’s Für Elise and land with great effect. — David John Chávez, Mercury News, 30 Jan. 2026 Matariyeh’s lawyer William Walker had submitted Norgaard addendums to Mataryieh’s guilty pleas in August. — Dale Morin, Twin Cities, 26 Nov. 2025 Before signing a lease agreement or any lease addendums, take time to carefully read through the terms. — Tamia Fowlkes, jsonline.com, 20 Oct. 2025

Recent Examples of Synonyms for addenda

Noun

The film’s story, much of it developed from Tolkien’s appendices, is set between The Hobbit and The Fellowship of the Ring.

— Tom Tapp, Deadline, 14 July 2026
Concise executive summaries matter more than dense appendices.

— Ashish Kumar Srivastava, Forbes.com, 12 Feb. 2026

Definition of appendixes

Noun

Summary The Phillies are actively seeking pitching depth to bolster their playoff push and challenge the Braves, as their bullpen has shown inconsistency and key additions are sidelined.

— Peter Chawaga, Forbes.com, 29 Aug. 2026
Those additions can complicate sorting and downstream recycling or reduce the quality of the recovered material.

— Alexandra Harrell, Footwear News, 28 Aug. 2026

Definition of additions

Noun

The firm continues to expect the Fed to hike 50 basis points this year, with increases at the September and December Federal Open Market Committee meetings.

— Justina Lee, CNBC, 31 Aug. 2026
The pattern of warmer than normal water along the equator in the Eastern Pacific heats things up and favors increases in the number of tropical storms and hurricanes in the Pacific.

— Doyle Rice, USA Today, 31 Aug. 2026

Definition of increases

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added up (to)

addenda

addendum

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“Addenda.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/addenda. Accessed 2 Sep. 2026.

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Synonyms of addenda

noun

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