Tothbrush or Toothbrush: How To spell?
The word Tothbrush is misspelled against Toothbrush, a noun meaning "A brush for cleaning the teeth."
Toothbrush has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings t & thbrush which should not be misspelled with single 'O'
Wrong Spelling:  t-o-thbrush  Correct Spelling:  t-oo-thbrush 
Check more misspelled words of Toothbrush to spell it correct.