THALLI is a playable word

thallus Scrabble® Dictionary

noun
pl. thalluses or thalli
a plant body without true root, stem, or leaf
(adjective) thalloid
42 Playable Words can be made from "THALLI"
   2-Letter Words (11 found)
   3-Letter Words (12 found)
   4-Letter Words (14 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)