The word Decenaries is misspelled against Decennaries, which is plural of "Decennary"
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Decennaries has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings dece & aries which should not be misspelled with single 'N'
Wrong Spelling: dece-n-aries
Correct Spelling: dece-nn-aries
Find more wrongly spelled words of Decennaries to spell it well.