SUNDOWN is a playable word

sundown Scrabble® Dictionary

verb
sundowned, sundowning, sundowns
to experience nighttime confusion
68 Playable Words can be made from "SUNDOWN"
   2-Letter Words (11 found)
   3-Letter Words (24 found)
   5-Letter Words (9 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)