Thunderprof or Thunderproof: How To spell?

The word Thunderprof is misspelled against Thunderproof, an adjective meaning "Secure against the effects of thunder or lightning."

Thunderproof has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings thunderpr & f which should not be misspelled with single 'O'
Wrong Spelling: thunderpr-o-f
Correct Spelling: thunderpr-oo-f
Check more misspelled words of Thunderproof to spell it correct.