abruptness
alacrity
capriciousness
desultoriness
deviability
eccentricity
erraticism
expeditiousness
feverishness
fickleness
flightiness
forwardness
freakishness
furiousness
haste
hastiness
hurriedness
impatience
impetuosity
impetuousness
impulse
inconsistency
inconstancy
instability
irregularity
mercuriality
moodiness
overhastiness
precipitance
precipitancy
precipitateness
precipitation
precipitousness
precociousness
precocity
prematureness
prematurity
promptness
quickness
rashness
recklessness
restlessness
rush
shiftiness
speed
suddenness
swiftness
uncertainty
undependability
unfixedness
thoughtlessness
unthoughtfulness
bravado
brusqueness
diffidence
disquietude
excitability
forcefulness
frankness
giddiness
heedlessness
inadvertence
inattention
inexperience
irritability
naïveté
petulance
prattle
spontaneity
unexpectedness
waywardness
wistfulness