The word Bused is misspelled against Bussed, which is past tense of "Buss"
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Bussed has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings bu & ed which should not be misspelled with single 'S'
Wrong Spelling:  bu-s-ed 
Correct Spelling:  bu-ss-ed 
Check more misspelled words of Bussed to spell it correct.