UMLAUT is a playable word

umlaut Scrabble® Dictionary

verb
umlauted, umlauting, umlauts
to modify a vowel sound by partial assimilation to a succeeding sound
30 Playable Words can be made from "UMLAUT"
   2-Letter Words (9 found)
   3-Letter Words (12 found)
   4-Letter Words (7 found)
   6-Letter Words (2 found)