Synonyms for ADDENDUM: appendix, codicil, afterword, supplement, epilogue, documentation, conclusion, addition; Antonyms of ADDENDUM: introduction, preface, foreword, prologue, prolog, reduction, decrease, loss

Synonyms for addendum in Free Thesaurus. Antonyms for addendum. 14 synonyms for addendum: addition, supplement, extra, extension, attachment, appendix, postscript, affix, adjunct, appendage, augmentation, codicil, supplement.

addendum noun In the sense of item of additional material added at end of book each chapter ends with a short addendum entitled ‘Further Reading’ Synonyms appendix • codicil • postscript • afterword • tailpiece • rider • coda • supplement • accompaniment • adjunct • appendage • addition • add-on • attachment • extension