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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