Interenal or Interrenal: How To spell?
The word Interenal is misspelled against Interrenal, a noun meaning "The interrenal body."
Interrenal has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings inte & enal which should not be misspelled with single 'R'
Wrong Spelling:  inte-r-enal  Correct Spelling:  inte-rr-enal 
Explore spell check of Interrenal to spell without errors.