The word Soty is misspelled against Sooty, a verb meaning "To black or foul with soot."
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Sooty has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings s & ty which should not be misspelled with single 'O'
Wrong Spelling:  s-o-ty 
Correct Spelling:  s-oo-ty 
Find more incorrect spellings of Sooty to spell right way.