rapidity

Noun

Synonyms: celerity quickness rapidness speediness

WordNet 3.0

Noun (1)

a rate that is rapidSynonyms: celerity quickness rapidness speediness

Webster's Dictionary (GCIDE)

Rapidity \Ra*pid"i*ty\ (r[.a]*p[i^]d"[i^]*t[y^]), n. [L. rapiditas: cf. F. rapidit['e].] The quality or state of being rapid; swiftness; celerity; velocity; as, the rapidity of a current; rapidity of speech; rapidity of growth or improvement. [1913 Webster]

Syn: Rapidness; haste; speed; celerity; velocity; swiftness; fleetness; quickness; agility. [1913 Webster]