RIVALLING is a playable word

rival Scrabble® Dictionary

verb
rivaled, rivaling, rivals or rivalled, rivalling, rivals
to strive to equal or surpass
128 Playable Words can be made from "RIVALLING"
   2-Letter Words (10 found)
   3-Letter Words (28 found)
   6-Letter Words (9 found)
   7-Letter Words (6 found)
   8-Letter Words (3 found)
   9-Letter Words (1 found)