TECTONIC is a playable word

tectonic Scrabble® Dictionary

adjective
pertaining to construction
70 Playable Words can be made from "TECTONIC"
   2-Letter Words (12 found)
   3-Letter Words (20 found)
   5-Letter Words (8 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)