The word Folprof is misspelled against Foolproof, meaning "incapable of failure or error"
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Foolproof has double 'oo' twice appearing mispronounced as 'o'
Remember double 'OO' appears twice in this word which should not be misspelled with single 'O'
Wrong Spelling:  f-o-lpr-o-f 
Correct Spelling:  f-oo-lpr-oo-f 
Find more incorrect spellings of Foolproof to spell right way.