precipitateness

Acting without thinking

Precipitateness is the quality of acting with excessive haste or without due deliberation.

The word shares meaning with precipitance and precipitation in their non-weather senses, all suggesting rashness or impulsive action: The precipitateness of his decision cost him dearly.

It's a formal, somewhat unwieldy noun rarely encountered outside literary or academic contexts.

haste

hurry

Move with urgency

hastiness · rapidity · quickness · expedience · acceleration · dash · scurry · sprint · urgency · impatience

foolhardiness

recklessness

Careless disregard for danger

brashness · daredevilry · overconfidence · boldness · venturesomeness · risk-taking · imprudence · indiscretion · wildness · harum-scarum

impulsiveness

spontaneity

Acting without forethought

thoughtlessness · heedlessness · carelessness · incaution · knee-jerk · whimsy · caprice · unreflectiveness · instinctiveness · unpreparedness

abruptness

suddenness

Quality of happening instantly

startle · surprise · discontinuity · sharpness · brusqueness · curtness · bluntness · peremptoriness · terseness · unceremonious

Opposites
speed of action

precipitatenessgradualness

Slow, steady progression

slowness · deliberateness · leisureliness · unhurriedness · measured pace

deliberation and care

precipitatenessdeliberation

Careful weighing of choices

caution · prudence · circumspection · carefulness · thoughtfulness

Family

precipitate, precipitation, precipitous, precipitant, precipitously, precipitated, precipitately, precipitating, precipitations

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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G