The word Butressing is misspelled against Buttressing, which is present continuous of "Buttress"
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Buttressing has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings bu & ressing which should not be misspelled with single 'T'
Wrong Spelling: bu-t-ressing
Correct Spelling: bu-tt-ressing
Check more misspelled words of Buttressing to spell it correct.