OUTRIVALLING is a playable word

outrival Scrabble® Dictionary

verb
outrivaled, outrivaling, outrivals or outrivalled, outrivalling, outrivals
to outdo in a competition or rivalry
577 Playable Words can be made from "OUTRIVALLING"
   2-Letter Words (24 found)
   3-Letter Words (94 found)
   10-Letter Words (1 found)
   11-Letter Words (1 found)
   12-Letter Words (1 found)