A technical differentiation between ballistic missiles and cruise missiles is in order here. For that purpose, a fact sheet provided by the Center for Arms Control and Non-Proliferation is quite useful:
“Ballistic missiles are powered initially by a rocket or series of rockets in stages, but then follow an unpowered trajectory that arches upwards before descending to reach its intended target. Ballistic missiles can carry either nuclear or conventional warheads.”
“Cruise missiles are unmanned vehicles that are propelled by jet engines, much like an airplane. They can be launched from ground, air or sea platforms…Cruise missiles remain within the atmosphere for the duration of their flight and can fly as low as a few meters off the ground. Flying low to the surface of the earth expends more fuel but makes a cruise missile very difficult to detect…Cruise missiles are self-guided and use multiple methods to accurately deliver their payload, including terrain mapping, global positioning systems (GPS) and inertial guidance, which uses motion sensors and gyroscopes to keep the missile on a pre-programmed flight path.”