Butonbush or Buttonbush: How To spell?
The word Butonbush is misspelled against Buttonbush, a noun meaning "A shrub (Cephalanthus occidentalis) growing by the waterside; -- so called from its globular head of flowers. See Capitulum."
Buttonbush has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings bu & onbush which should not be misspelled with single 'T'
Wrong Spelling:  bu-t-onbush  Correct Spelling:  bu-tt-onbush 
Check more misspelled words of Buttonbush to spell it correct.