pirouette (term used in Ballet for a full turn of the body on the point of the toe or the ball of the foot)
There aren't any 9 letter words ending in 'joust'.
Spaghetti
Kickstand is a 9 letter word. Kidnapped is a 9 letter word.
antipathy
variegate
Replanted
wonderful
slaughter
unnatural
Nightgear
Inventing, investing.
unwise