swiftness

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a rate (usually rapid) at which something happens
- the project advanced with gratifying speed
• Syn:
speed, fastness
• Derivationally related forms:
fast (for: fastness), swift, speedy (for: speed), speed (for: speed)
• Hypernyms:
pace, rate
• Hyponyms:
haste, hastiness, hurry, hurriedness, precipitation,
execution speed, graduality, gradualness
• Attrubites:
fast, slow

• Từ đồng nghĩa / Synonyms:
  speed, fastness