Ferugineous or Ferrugineous: How To spell?
The word Ferugineous is misspelled against Ferrugineous, an adjective meaning "Ferruginous."
Ferrugineous has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings fe & ugineous which should not be misspelled with single 'R'
Wrong Spelling:  fe-r-ugineous  Correct Spelling:  fe-rr-ugineous 
Check more misspelled words of Ferrugineous to spell it correct.