UPSIZING is a playable word

upsize Scrabble® Dictionary

verb
upsized, upsizing, upsizes
to increase in size
73 Playable Words can be made from "UPSIZING"
   2-Letter Words (9 found)
   3-Letter Words (27 found)
   5-Letter Words (7 found)
   6-Letter Words (5 found)
   8-Letter Words (1 found)