SPLINES is a playable word

spline Scrabble® Dictionary

verb
splined, splining, splines
to provide with a spline (a key that connects two rotating mechanical parts)
101 Playable Words can be made from "SPLINES"
   2-Letter Words (10 found)
   3-Letter Words (23 found)
   6-Letter Words (10 found)
   7-Letter Words (4 found)