Fireprofing or Fireprrofing: How To spell?
The word Fireprofing is misspelled against Fireprrofing, a noun meaning "The act or process of rendering anything incombustible; also, the materials used in the process."
Fireprrofing has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings firep & ofing which should not be misspelled with single 'R'
Wrong Spelling:  firep-r-ofing  Correct Spelling:  firep-rr-ofing 
Find more incorrect spellings of Fireprrofing to spell right way.