The phrase "a swiftness" is correct and usable in written English.
It can be used when referring to the quality or state of being swift or quick in action or movement.
Example: "The athlete's performance was marked by a swiftness that left the audience in awe."
Alternatives: "a quickness" or "a speediness".
Something was going on between the other kids, something swift, subtle, constantly changing an exchange of meanings, a negotiation, a swiftness of understanding so remarkable that sometimes she wondered if they were all telepathic.
Something was going on between the other kids, something swift, subtle, constantly changing — an exchange of meanings, a negotiation, a swiftness of understanding so remarkable that sometimes she wondered if they were all telepathic.
The Saudi was identified, with a swiftness that surprised some, by body parts found at the scene in Sultanahmet.
The Kmart crisis intruded with a swiftness that caught Mr. Adamson and other board members off guard, he said.
At once compelling and unreachable, he has a swiftness of mind which convinces the audience that language is being coined in the moment.
"Nope," the man said, deleting the e-mail with a swiftness of click attainable only when one receives that kind of e-mail.
Joe Bowie's genie-in-a-bottle swiftness comes into play amid the repeated stamps and the falls to the floor of the ensemble.
Yet the picture has an arrowlike swiftness, and a good part of Greene's intelligence and candor comes through.
There's a fluidity to the staging that is almost vaudevillian, with a pair of glasses or a change of hat indicating that a performer has assumed another role, and a persistent swiftness to the pace that leads us over the spots where the narrative flags to the next song, which is, of course, where the emphasis of the show rightly belongs.
When dribbling, he keeps the ball on an obedient little string; when he finally shoots it, that string is cut with an uncanny swiftness and lightness, a soft but exact flick of the wrist that sends the ball on a seemingly inevitable path to Swish.
The musical moves from scene to scene with a fluid swiftness that evoked the satisfying finger-swipe across the glossy surface of a tablet or a smartphone.
