
1) Abruptness 2) Acceleration 3) Celerity 4) Deceleration 5) Eagerness 6) Fastness 7) Graduality 8) Haste 9) Hastiness 10) Hurriedness 11) Pernicity 12) Rapidity 13) Retardation 14) Skill 15) Slowing 16) Speed 17) Velocity
Found on
https://www.crosswordclues.com/clue/swiftness

1) Fastness 2) Pace 3) Rate 4) Speed
Found on
https://www.crosswordclues.com/clue/swiftness

• (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.
Found on
http://thinkexist.com/dictionary/meaning/swiftness/
Swift'ness noun 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.
Found on
http://www.encyclo.co.uk/webster/S/258
No exact match found.