The word Harneser is misspelled against Harnesser, a noun meaning "One who harnesses."
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Harnesser has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings harne & er which should not be misspelled with single 'S'
Wrong Spelling:  harne-s-er 
Correct Spelling:  harne-ss-er 
Explore spell check of Harnesser to spell without errors.