celerity

Từ điển American Heritage Dictionary 4th

ce·ler·i·ty (sə-lĕrʹĭ-tē)n.
Swiftness of action or motion; speed. See Synonyms at haste. [French célérité, from Old French, from Latin celeritās, from celer, swift.]

• Từ đồng nghĩa / Synonyms:
  quickness, rapidity, rapidness, speediness