Waistcoater or Waistcoateer: How To spell?
The word Waistcoater is misspelled against Waistcoateer, a noun meaning "One wearing a waistcoat; esp., a woman wearing one uncovered, or thought fit for such a habit; hence, a loose woman; strumpet."
Waistcoateer has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Waistcoat & r which should not be misspelled with single 'E'
Wrong Spelling:  Waistcoat-e-r  Correct Spelling:  Waistcoat-ee-r 
Find more incorrect spellings of Waistcoateer to spell right way.