impromptu

noun 0.703

spontaneity

noun 0.662

last minute

noun 0.624

impulse purchase

noun 0.621

impulse

noun 0.619

impulse buy

noun 0.614

spur

noun 0.596

extempore

noun 0.595

impulsiveness

noun 0.588

snap judgment

noun 0.582

impulsive

noun 0.580

impetuosity

noun 0.574

bolt from the blue

noun 0.573

whim

noun 0.570

impetuousness

noun 0.570

improvisation

noun 0.568

impulsivity

noun 0.567

instant

noun 0.562

momentariness

noun 0.560

spurt

noun 0.555

suddenness

noun 0.550

gut reaction

noun 0.549

spurring

noun 0.544

moment

noun 0.534

improv

noun 0.533

harum-scarum

noun 0.531

improvising

noun 0.529

spree

noun 0.525

ex tempore

noun 0.517

flash in the pan

noun 0.515

happenstance

noun 0.514

quick

noun 0.513

man of the moment

noun 0.511

hastiness

noun 0.509

unforeseen

noun 0.509

element of surprise

noun 0.506

eureka moment

noun 0.506

one-off

noun 0.505

hot minute

noun 0.505

short time

noun 0.505

brainstorm

noun 0.504

serendipity

noun 0.503

flight of fancy

noun 0.502

impulse function

noun 0.502

unexpectedness

noun 0.502

outburst

noun 0.501