rapidness

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a rate that is rapid
• Syn:
celerity, quickness, rapidity, speediness
• Derivationally related forms:
speedy (for: speediness), rapid, rapid (for: rapidity), quick (for: quickness)
• Hypernyms:
pace, rate
• Hyponyms:
fleetness, immediacy, immediateness, instantaneousness, instancy,
dispatch, despatch, expedition, expeditiousness, promptness, promptitude