SIBSHIPS is a playable word

sibship Scrabble® Dictionary

noun
pl. sibships
a group of children having the same parents
28 Playable Words can be made from "SIBSHIPS"
   2-Letter Words (6 found)
   3-Letter Words (9 found)
   4-Letter Words (10 found)
   5-Letter Words (1 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)