TRELLISING is a playable word

trellis Scrabble® Dictionary

verb
trellised, trellising, trellises
to provide with a trellis (a frame used as a support for climbing plants)
417 Playable Words can be made from "TRELLISING"
   2-Letter Words (15 found)
   9-Letter Words (3 found)
   10-Letter Words (1 found)