The word Decurence is misspelled against Decurrence, a noun meaning "The act of running down; a lapse."
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Decurrence has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings decu & ence which should not be misspelled with single 'R'
Wrong Spelling:  decu-r-ence 
Correct Spelling:  decu-rr-ence 
Check more misspelled words of Decurrence to spell it correct.