Synonyms of swiftness in English:

swiftness


See definition of swiftness

noun

1‘the children had the swiftness of weasels’

SYNONYMS

speed, speediness, quickness, velocity, celerity, fleetness, fastness, rapidity, rapidness, liveliness

informal nippiness

ANTONYMS

slowness, sluggishness

2‘bankruptcy can happen with surprising swiftness’

SYNONYMS

suddenness, abruptness, instantaneity, rapidity, rapidness, haste, hastiness, briskness, hurriedness, hurry

3‘the answer came with unwanted swiftness’

SYNONYMS

promptness, immediateness, immediacy, instantaneousness, rapidity, rapidness, dispatch, punctuality

alacrity, expeditiousness, readiness, willingness

ANTONYMS

lateness, tardiness