APOTHEM is a playable word

apothem Scrabble® Dictionary

noun
pl. apothems
the perpendicular from the center to any side of a regular polygon
133 Playable Words can be made from "APOTHEM"
   2-Letter Words (24 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)