After you play the game hit the refresh button and you will see new terms and definitions. Play until you know all 15. Be careful, 2 have very similar definitions.
TERMS: Use these to spell them correctly, then, later try playing the game and spelling them on your own. untamable - fortune - great - descend - pelted - kindly - nimbly - gait - alarmed - unseated - dashed - mount - faithful - reckless - mourn