Found 2 items, similar to suddenness.
English → English (WordNet)
Definition: suddenness
suddenness
n : the quality of happening with headlong haste or without
warning [syn: 
abruptness, 
precipitateness, 
precipitance,
precipitancy]
English → English (gcide)
Definition: Suddenness
Sudden 
\Sud"den\, a. [OE. sodian, sodein, OF. sodain, sudain, F.
soudain, L. subitaneus, fr. subitus sudden, that has come
unexpectedly, p. p. of subire to come on, to steal upon; sub
under, secretly + ire to go. See 
Issue, and cf.
Subitaneous.]
1. Happening without previous notice or with very brief
notice; coming unexpectedly, or without the common
preparation; immediate; instant; speedy. 
“O sudden wo!”
--Chaucer. 
“For fear of sudden death.” --Shak.
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Sudden fear troubleth thee. --Job xxii.
10.
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2. Hastly prepared or employed; quick; rapid.
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Never was such a sudden scholar made. --Shak.
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The apples of Asphaltis, appearing goodly to the
sudden eye. --Milton.
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3. Hasty; violent; rash; precipitate. [Obs.] --Shak.
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Syn: Unexpected; unusual; abrupt; unlooked-for.
[1913 Webster] -- 
Sud"den*ly, adv. -- 
Sud"den*ness,
n.
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