SIGLUM is a playable word

siglum Scrabble® Dictionary

noun
pl. sigla
an abbreviation to indicate the source of an edited text
43 Playable Words can be made from "SIGLUM"
   2-Letter Words (8 found)
   3-Letter Words (16 found)
   4-Letter Words (15 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)