UPBUILT is a playable word

upbuild Scrabble® Dictionary

verb
upbuilt, upbuilding, upbuilds
to build up
31 Playable Words can be made from "UPBUILT"
   2-Letter Words (7 found)
   3-Letter Words (16 found)
   4-Letter Words (4 found)
   5-Letter Words (3 found)
   7-Letter Words (1 found)