SINKS is a playable word

sink Scrabble® Dictionary

verb
sank, sunk or sunken, sinking, sinks
to move to a lower level
(adjective) sinkable
20 Playable Words can be made from "SINKS"
   2-Letter Words (4 found)
   3-Letter Words (7 found)
   4-Letter Words (7 found)
   5-Letter Words (2 found)