PLENUMS is a playable word

plenum Scrabble® Dictionary

noun
pl. plenums or plena
space considered as fully occupied by matter
87 Playable Words can be made from "PLENUMS"
   2-Letter Words (13 found)
   3-Letter Words (29 found)
   5-Letter Words (12 found)
   6-Letter Words (4 found)
   7-Letter Words (2 found)