THERETO is a playable word

thereto Scrabble® Dictionary

adverb
to that
62 Playable Words can be made from "THERETO"
   2-Letter Words (11 found)
   3-Letter Words (20 found)
   4-Letter Words (14 found)
   5-Letter Words (11 found)
   6-Letter Words (5 found)
   7-Letter Words (1 found)