The word Shampoer is misspelled against Shampooer, a noun meaning "One who shampoos."
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Shampooer has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings shamp & er which should not be misspelled with single 'O'
Wrong Spelling:  shamp-o-er 
Correct Spelling:  shamp-oo-er 
Find more incorrect spellings of Shampooer to spell right way.