SPONGE is a playable word

sponge Scrabble® Dictionary

verb
sponged, sponging or spongeing, sponges
to wipe with a sponge (a mass of absorbent material)
69 Playable Words can be made from "SPONGE"
   2-Letter Words (12 found)
   3-Letter Words (22 found)
   5-Letter Words (6 found)
   6-Letter Words (2 found)