OPEN is a playable word

open Scrabble® Dictionary

adjective
opener, openest
affording unobstructed access, passage, or view
verb
opened, opening, opens
to cause to become open
(adjective) openable
16 Playable Words can be made from "OPEN"
   2-Letter Words (8 found)
   3-Letter Words (4 found)
   4-Letter Words (4 found)