This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The state of being sudden.

n. The state or character of being sudden, in any sense; a coming or happening without previous notice.

n. the quality of happening with headlong haste or without warning

"“Then it dawned upon me with a certain suddenness,” he wrote in these pages in 1897, “that I was different from the others; or like, mayhap, in heart and life and longing, but shut out from their world by a vast veil.”"

haste    hurry    precipitation    hastiness    hurriedness   

swiftness    abruptness    celerity    clarity    vehemence    ferocity    impetuosity    directness    unexpectedness    intensity