Definitions

[Airicist]

Airship or dirigible (https://en.wikipedia.org/wiki/Airship) on Wikipedia

Semi-rigid airship (https://en.wikipedia.org/wiki/Semi-rigid_airship) on Wikipedia

Blimp (https://en.wikipedia.org/wiki/Blimp) on Wikipedia

Hybrid airship (https://en.wikipedia.org/wiki/Hybrid_airship) on Wikipedia