Prefering or Preferring: How To spell?

The word Prefering is misspelled against Preferring, which is present continuous of "Prefer"

Preferring has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings prefe & ing which should not be misspelled with single 'R'
Wrong Spelling: prefe-r-ing
Correct Spelling: prefe-rr-ing
Find more wrongly spelled words of Preferring to spell it well.