The word Ripraping is misspelled against Riprapping, which is present continuous of "Riprap"
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Riprapping has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings ripra & ing which should not be misspelled with single 'P'
Wrong Spelling:  ripra-p-ing 
Correct Spelling:  ripra-pp-ing 
Find more wrongly spelled words of Riprapping to spell it well.