The word Overruning is misspelled against Overrunning, which is present continuous of "Overrun"
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Overrunning has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings overru & ing which should not be misspelled with single 'N'
Wrong Spelling:  overru-n-ing 
Correct Spelling:  overru-nn-ing 
Check more misspelled words of Overrunning to spell it correct.