Pionered or Pioneered: How To spell?

The word Pionered is misspelled against Pioneered, which is past tense of "Pioneer"

Pioneered has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings Pion & red which should not be misspelled with single 'E'
Wrong Spelling: Pion-e-red
Correct Spelling: Pion-ee-red
Find more incorrect spellings of Pioneered to spell right way.