Smothbore or Smoothbore: How To spell?
The word Smothbore is misspelled against Smoothbore, a noun meaning "A smoothbore firearm."
Smoothbore has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings sm & thbore which should not be misspelled with single 'O'
Wrong Spelling:  sm-o-thbore  Correct Spelling:  sm-oo-thbore 
Find more incorrect spellings of Smoothbore to spell right way.