Colstaf or Colstaff: How To spell?

The word Colstaf is misspelled against Colstaff, a noun meaning "A staff by means of which a burden is borne by two persons on their shoulders."

Colstaff has double 'ff' in the end mispronounced as 'f'
Remember double 'FF' appears in the end of this word which should not be misspelled with single 'F'
Wrong Spelling:  colsta-f 
Correct Spelling:  colsta-ff 
Find more incorrect spellings of Colstaff to spell right way.

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