suddenness (n.)
- abruptness
- alacrity
- expeditiousness
- feverishness
- furiousness
- haste
- hastiness
- hurriedness
- impatience
- impetuosity
- impetuousness
- impulsiveness
- precipitance
- precipitancy
- precipitateness
- precipitation
- precipitousness
- promptness
- quickness
- rashness
- recklessness
- speed
- swiftness
- unexpectedness
