POSTFIX is a playable word

postfix Scrabble® Dictionary

verb
postfixed, postfixing, postfixes
to affix at the end of something
66 Playable Words can be made from "POSTFIX"
   2-Letter Words (15 found)
   3-Letter Words (29 found)
   4-Letter Words (18 found)
   5-Letter Words (3 found)
   7-Letter Words (1 found)