The word Adenda is misspelled against Addenda, which is plural of "Addendum"
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Addenda has double "dd" is mispronounced as "d"
Remember double 'DD' in between the strings A & enda which should not be misspelled with single 'D'
Wrong Spelling: A-d-enda
Correct Spelling: A-dd-enda
Explore spell check of Addenda to spell without errors.