Subteraneous or Subterraneous: How To spell?
The word Subteraneous is misspelled against Subterraneous, an adjective meaning "Being or lying under the surface of the earth; situated within the earth, or under ground; as, subterranean springs; a subterraneous passage."
Subterraneous has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings subte & aneous which should not be misspelled with single 'R'
Wrong Spelling:  subte-r-aneous  Correct Spelling:  subte-rr-aneous 
Check more misspelled words of Subterraneous to spell it correct.