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