FRENUM is a playable word

frenum Scrabble® Dictionary

noun
pl. frenums or frena
a connecting fold of membrane
37 Playable Words can be made from "FRENUM"
   2-Letter Words (12 found)
   3-Letter Words (15 found)
   4-Letter Words (6 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)