Sliperness or Slipperness: How To spell?

The word Sliperness is misspelled against Slipperness, a noun meaning "Slipperiness."

Slipperness has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings sli & erness which should not be misspelled with single 'P'
Wrong Spelling:  sli-p-erness 
Correct Spelling:  sli-pp-erness 
Find more wrongly spelled words of Slipperness to spell it well.

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