Waterprof or Waterproof: How To spell?
The word Waterprof is misspelled against Waterproof, a noun meaning "A substance or preparation for rendering cloth, leather, etc., impervious to water."
Waterproof has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings waterpr & f which should not be misspelled with single 'O'
Wrong Spelling:  waterpr-o-f  Correct Spelling:  waterpr-oo-f 
Find more incorrect spellings of Waterproof to spell right way.