CYPHER is a playable word

cypher Scrabble® Dictionary

verb
cyphered, cyphering, cyphers
to cipher
32 Playable Words can be made from "CYPHER"
   2-Letter Words (6 found)
   3-Letter Words (16 found)
   4-Letter Words (6 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)