| fly-by-night(adjective, short, unreliable, brief, shady) |
| ever-changing |
| fading(verb, adjective, brief, transient, transitory) |
| fickle(adjective, impulsive, unpredictable, capricious, transient) |
| capricious(adjective, impulsive, unpredictable, capricious, explosive) |
| changeable(adjective, present, short, limited, brief) |
| mortal(adjective, transient) |
| short-term(adjective, temporary, transient) |
| elusive(adjective, vague, impulsive, unpredictable, mysterious) |
| impulsive(adjective, quick, unpredictable, speedy, capricious) |
| inconstant(adjective, impulsive, unpredictable, explosive) |
| little(adjective, light, slight, precise, amount) |
| meteoric(adjective, brief, immediate, instant, sudden) |
| momentaneous(adjective, transientness) |
| mutable(adjective, transient) |
| abrupt(adjective, quick, speedy, immediate, instant) |
| erratic(adjective, impulsive, unpredictable, capricious, explosive) |
| flashing(noun, adjective, hot, quick, nimble) |
| fleet(adjective, time, continue, hot, quick) |
| flickering(adjective, transient) |