plural
addenda
/-ˈdɛndə/
/əˈdɛndə/
or
addendums
plural
addenda
/-ˈdɛndə/
/əˈdɛndə/
or
addendums
Britannica Dictionary definition of ADDENDUM
[count]
:
something that is added
especially
:
a section of a book that is added to the main or original text