The state, quality, or condition of being a fiend.
1849, Sidney Smith, The Mother Country (page 118)Nay, perhaps, mankind being possessed of a given quantity of devil, it is doubtful whether to check its fiendship in its straightforward course, but drives it to break out unnaturally in another place.
1978, Mediaevalia (volumes 3-4, page 222)But more than these individual points of comparision makes brothers in fiendship the Devils of poem and plays.