The word Troler is misspelled against Troller, a noun meaning "One who trolls."
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Troller has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings tro & er which should not be misspelled with single 'L'
Wrong Spelling:  tro-l-er 
Correct Spelling:  tro-ll-er 
Find more incorrect spellings of Troller to spell right way.