COSIGNS is a playable word

cosign Scrabble® Dictionary

verb
cosigned, cosigning, cosigns
to sign jointly
67 Playable Words can be made from "COSIGNS"
   2-Letter Words (10 found)
   3-Letter Words (20 found)
   4-Letter Words (19 found)
   5-Letter Words (11 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)