Slipiness or Slippiness: How To spell?

The word Slipiness is misspelled against Slippiness, a noun meaning "Slipperiness."

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

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