RUNNIER is a playable word

runny Scrabble® Dictionary

adjective
runnier, runniest
tending to drip
35 Playable Words can be made from "RUNNIER"
   2-Letter Words (7 found)
   3-Letter Words (11 found)
   4-Letter Words (5 found)
   5-Letter Words (9 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)