Butressing or Buttressing: How To spell?

The word Butressing is misspelled against Buttressing, which is present continuous of "Buttress"

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.