Antonyms of noun gradualness

1 of 2 senses of gradualness

Sense 1
gradualness, gentleness -- (the property possessed by a slope that is very gradual)
       Antonym of abruptness (Sense 2)
      => abruptness, precipitousness, steepness -- (the property possessed by a slope that is very steep)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun gradualness

2 senses of gradualness

Sense 1
gradualness, gentleness -- (the property possessed by a slope that is very gradual)
       => gradient, slope -- (the property possessed by a line or surface that departs from the horizontal; "a five-degree gradient")

Sense 2
graduality, gradualness -- (the quality of being gradual or of coming about by gradual stages)
       => speed, swiftness, fastness -- (a rate (usually rapid) at which something happens; "the project advanced with gratifying speed")