SUPPOSE is a playable word

suppose Scrabble® Dictionary

verb
supposed, supposing, supposes
to assume to be true
63 Playable Words can be made from "SUPPOSE"
   2-Letter Words (9 found)
   3-Letter Words (20 found)
   5-Letter Words (10 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)