COTTER is a playable word

cotter Scrabble® Dictionary

noun
pl. cotters
a pin or wedge used for fastening parts together
(adjective) cottered
41 Playable Words can be made from "COTTER"
   2-Letter Words (7 found)
   3-Letter Words (16 found)
   4-Letter Words (11 found)
   5-Letter Words (6 found)
   6-Letter Words (1 found)