Interoseous or Interosseous: How To spell?
The word Interoseous is misspelled against Interosseous, an adjective meaning "Situated between bones; as, an interosseous ligament."
Interosseous has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings intero & eous which should not be misspelled with single 'S'
Wrong Spelling:  intero-s-eous  Correct Spelling:  intero-ss-eous 
Check more misspelled words of Interosseous to spell it correct.