UTMOSTS is a playable word

utmost Scrabble® Dictionary

noun
pl. utmosts
the greatest degree or amount
68 Playable Words can be made from "UTMOSTS"
   2-Letter Words (9 found)
   3-Letter Words (18 found)
   5-Letter Words (12 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)