SPITEFULLER is a playable word

spiteful Scrabble® Dictionary

adjective
spitefuller, spitefullest
malicious
722 Playable Words can be made from "SPITEFULLER"
   2-Letter Words (19 found)
   3-Letter Words (81 found)
   9-Letter Words (4 found)
   11-Letter Words (1 found)