MILLRUN is a playable word

millrun Scrabble® Dictionary

noun
pl. millruns
a millrace
33 Playable Words can be made from "MILLRUN"
   2-Letter Words (7 found)
   3-Letter Words (15 found)
   4-Letter Words (9 found)
   5-Letter Words (1 found)
   7-Letter Words (1 found)