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.

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