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Addenda vs. Addendum

Addenda

Additional material provided at the end of a book, document, or article

Examples:

Synonyms:

Antonyms:

This word has no antonyms

Addendum

/əˈdendəm/

An additional piece of information added at the end of a document or book

Examples:

Synonyms:

Antonyms:

Ways to tell them apart:

Addenda is plural while addendum is singular.
An addendum is one additional item or text, while addenda refers to multiple items.
Remember that addendum ends with m, indicating its a single modification, whereas addenda ends in a,' signaling pluralization.
Think of addendum when you have one update or addition, like an appendix to a book.
Use addenda when there are several postscript items or notes to consider.

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