ARCANUM is a playable word

arcanum Scrabble® Dictionary

noun
pl. arcanums or arcana
a mystery
48 Playable Words can be made from "ARCANUM"
   2-Letter Words (10 found)
   3-Letter Words (21 found)
   4-Letter Words (12 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)