SLACK is a playable word

slack Scrabble® Dictionary

adjective
slacker, slackest
not tight or taut
verb
slacked, slacking, slacks
to slacken

21 Playable Words can be made from "SLACK"

   2-Letter Words (4 found)

   3-Letter Words (9 found)

   4-Letter Words (5 found)

   5-Letter Words (3 found)