The word Interer is misspelled against Interrer, a noun meaning "One who inters."
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Interrer has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings inte & er which should not be misspelled with single 'R'
Wrong Spelling:  inte-r-er 
Correct Spelling:  inte-rr-er 
Explore spell check of Interrer to spell without errors.