UNDERTAXES is a playable word

undertax Scrabble® Dictionary

verb
undertaxed, undertaxing, undertaxes
to tax less than the usual amount
617 Playable Words can be made from "UNDERTAXES"
   2-Letter Words (25 found)
   3-Letter Words (82 found)
   9-Letter Words (3 found)
   10-Letter Words (1 found)