swiftness

同义词：

quickly | immediately | forthwith | headlong | pell-mell | speedily | fast | summarily | rapidly | at the double | on the double | promptly | suddenly | in the blink of an eye | in a flash | like greased lightning | like a shot | expeditiously | precipitously | instantly | fleetly |

反义词：

slowly |

词义辨析：

同义参见:

expedition

celerity

velocity

haste

speed