The word Winterkiled is misspelled against Winterkilled, which is past tense of "Winterkill"
-->
Winterkilled has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings winterki & ed which should not be misspelled with single 'L'
Wrong Spelling:  winterki-l-ed 
Correct Spelling:  winterki-ll-ed 
Find more wrongly spelled words of Winterkilled to spell it well.