SINUSOID is a playable word

sinusoid Scrabble® Dictionary

noun
pl. sinusoids
a mathematical curve
78 Playable Words can be made from "SINUSOID"
   2-Letter Words (14 found)
   3-Letter Words (27 found)
   5-Letter Words (9 found)
   6-Letter Words (2 found)
   8-Letter Words (1 found)