Marubium or Marrubium: How To spell?
The word Marubium is misspelled against Marrubium, a noun meaning "A genus of bitter aromatic plants, sometimes used in medicine; hoarhound."
Marrubium has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings ma & ubium which should not be misspelled with single 'R'
Wrong Spelling:  ma-r-ubium  Correct Spelling:  ma-rr-ubium 
Check more misspelled words of Marrubium to spell it correct.