LADDER is a playable word

ladder Scrabble® Dictionary

verb
laddered, laddering, ladders
to cause a run in a stocking
52 Playable Words can be made from "LADDER"
   2-Letter Words (11 found)
   3-Letter Words (15 found)
   4-Letter Words (14 found)
   5-Letter Words (9 found)
   6-Letter Words (3 found)