CALCULUS is a playable word

calculus Scrabble® Dictionary

noun
pl. calculuses or calculi
a branch of mathematics
35 Playable Words can be made from "CALCULUS"
   2-Letter Words (4 found)
   3-Letter Words (8 found)
   4-Letter Words (11 found)
   5-Letter Words (8 found)
   6-Letter Words (3 found)
   8-Letter Words (1 found)