Sputered or Sputtered: How To spell?

The word Sputered is misspelled against Sputtered, which is past tense of "Sputter"

Sputtered has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings spu & ered which should not be misspelled with single 'T'
Wrong Spelling: spu-t-ered
Correct Spelling: spu-tt-ered
Check more misspelled words of Sputtered to spell it correct.