Projectile. You have spelled it correctly.
Oellet
The correct spelling is trajectory (path of a projectile, missile, or rocket).
That is the proper spelling of the word "cannonball" (a projectile, speeding object, or dive). The two-word form is normally used only for the projectile, a cannon ball.
The correct spelling is "rocket" (a projectile or vehicle carrying its own fuel and oxidizer).
a projectile is the answer
They were shooting projectile out of their guns.
To propel a projectile.
A projectile need not revolve at all in order to be a projectile.
The speed of the projectile is 974.15 km/h.
Two forces that act on a projectile are gravity, which pulls the projectile downwards, and air resistance, which opposes the projectile's motion through the air.
The path of a projectile is it's trajectory.
The path of a projectile in earth gravity is that of a parabola.