Rapidity
Pronunciation : Ra*pid"i*ty
Part of Speech : n.
Etymology : [L. rapiditas: cf. F. rapidit?.]
Definition : Defn: The quality or state of being rapid; swiftness; celerity; velocity; as, the rapidity of growth or improvement.
Syn. -- -- Rapidness; haste; speed; celerity; velocity; swiftness; fleetness; quickness; agility.
Source : Webster's Unabridged Dictionary, 1913