PROPRIUM is a playable word

proprium Scrabble® Dictionary

noun
pl. propria
an attribute belonging inseparably to every member of a species
52 Playable Words can be made from "PROPRIUM"
   2-Letter Words (11 found)
   3-Letter Words (21 found)
   4-Letter Words (13 found)
   5-Letter Words (6 found)
   8-Letter Words (1 found)