Noah Webster's Dictionary (n.) The quality or state of being swift; speed; quickness; celerity; velocity; rapidity; as, the swiftness of a bird; the swiftness of a stream; swiftness of descent in a falling body; swiftness of thought, etc.

Multi-Version Concordance Swiftness (2 Occurrences) Numbers 23:22 God is bringing them out from Egypt, As the swiftness of a Reem is to him; (YLT) Numbers 24:8 God is bringing him out of Egypt; As the swiftness of a Reem is to him, He eateth up nations his adversaries, And their bones he breaketh, And 'with' his arrows he smiteth, (YLT)