PREWARN is a playable word

prewarn Scrabble® Dictionary

verb
prewarned, prewarning, prewarns
to warn in advance
85 Playable Words can be made from "PREWARN"
   2-Letter Words (13 found)
   3-Letter Words (29 found)
   5-Letter Words (9 found)
   6-Letter Words (7 found)
   7-Letter Words (2 found)