GROUND ATTACK
Ability to conduct aerial bombing of ground targets by way of (but not limited to) guns, bombs, missiles, rockets, and the like.
INTELLIGENCE-SURVEILLANCE-RECONNAISSANCE
Surveil ground targets / target areas to assess environmental threat levels, enemy strength, or enemy movement.
X-PLANE
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.
UNMANNED
Aircraft inherently designed (or later developed) with an unmanned capability to cover a variety of over-battlefield roles.