Jacknife or Jackknife: How To spell?

The word Jacknife is misspelled against Jackknife, a noun meaning "A large, strong clasp knife for the pocket; a pocket knife."

Jackknife has double "kk" is mispronounced as "k"
Remember double 'KK' in between the strings jac & nife which should not be misspelled with single 'K'
Wrong Spelling:  jac-k-nife 
Correct Spelling:  jac-kk-nife 
Find more wrongly spelled words of Jackknife to spell it well.