CALPAIN is a playable word

calpain Scrabble® Dictionary

noun
pl. calpains
an enzyme for digesting proteins
70 Playable Words can be made from "CALPAIN"
   2-Letter Words (10 found)
   3-Letter Words (22 found)
   5-Letter Words (10 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)