Capricious, Changeable, Corruptible, Cruising, Cursory, Dashing, Deciduous, Descending, Disappearing, Dissolving, Downward, Drifting, Dying, Ephemeral, Evanescent, Evaporating, Expeditious, Express, Fading, Fast, Feverish, Fickle, Fleet, Fleeting, Flight, Flitting, Flowing, Fluent, Fluttering, Fragile, Frail, Fugitive, Furious, Galloping, Gliding, Going, Hasty, Headlong, Hovering, Hurried, Hustling, Immediate, Impermanent, Impetuous, Impulsive, Inconstant, Instant, Insubstantial, Lively, Melting, Mercurial, Momentary, Mortal, Mounting, Mutable, Nimble, Passing, Perishable, Plunging, Precipitate, Progressive, Prompt, Quick, Rapid, Reckless, Regressive, Retrogressive, Rising, Rotary, Rotational, Rotatory, Running, Rushing, Sailing, Sinking, Slapdash, Aeronautics, Agile, Airborne, Airline, Ascending, Astronautics, Aviation, Axial, Back, Backward, Ballooning, Breakneck, Brittle, Snap, Snappy, Soaring, Spanking, Speedy, Streaming, Superficial, Swift, Temporal, Temporary, Transient, Transitive, Transitory, Unstable, Upward, Urgent, Vanishing, Volatile, Winged, Winging