Projectile and Step rocket

Projectile noun - A weapon that is forcibly thrown or projected at a targets but is not self-propelled.

Step rocket and projectile are semantically related. In some cases you can replace phrase "Step rocket" with "Projectile", this terms are similar.

Nearby Word: projection

Step rocket noun - A rocket having two or more rocket engines (each with its own fuel) that are fired in succession and jettisoned when the fuel is exhausted.

Projectile and step rocket are semantically related. You can use "Projectile" instead a noun phrase "Step rocket".