OCTAVAL is a playable word

octave Scrabble® Dictionary

noun
pl. octaves
a type of musical interval
(adjective) octaval
52 Playable Words can be made from "OCTAVAL"
   2-Letter Words (7 found)
   3-Letter Words (20 found)
   4-Letter Words (18 found)
   5-Letter Words (5 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)