GAZUMP is a playable word

gazump Scrabble® Dictionary

verb
gazumped, gazumping, gazumps
to cheat by raising the price originally agreed upon
25 Playable Words can be made from "GAZUMP"
   2-Letter Words (8 found)
   3-Letter Words (13 found)
   4-Letter Words (3 found)
   6-Letter Words (1 found)