The phrase "a swiftly moving" is correct and usable in written English.
It can be used to describe something that is moving quickly, often in a literary or descriptive context.
Example: "The river was a swiftly moving current, carrying leaves and debris downstream."
Alternatives: "a rapidly flowing" or "a fast-moving".
Yet Oberon is a swiftly moving supernatural creature.
Presented with a difficult piece fueled by intricate ensembles and a swiftly moving libretto by Lorenzo da Ponte, companies large and small have had their go at it.
The most common mining technique in that era involved shovelling earth into a wooden trough, called a sluice box, then directing a swiftly moving stream of water over it, in the hope of washing away everything but gold.
In untangling the history of the controversial — and, as yet, unfinished — highway, Dellinger glimpsed American life as it is perhaps best viewed: through the kaleidoscopic lens of a swiftly moving automobile.
Early on a recent weekend, I found myself in a swiftly moving line, surveying what looked like the best part of the food pyramid: chopped peaches, sweet potatoes, red cabbage, chicken, sesame tofu and more.
On its broad brick-surfaced terrace, where I rewarded myself with a beer and tapas before lunch, the only sound was that of a swiftly moving stream leading through pines to a series of fish hatcheries.
Chocolate rivers flowed on a number of swiftly moving conveyers through gaps in the wall to mysterious chambers beyond.
General Hospital campus, leasing and building smaller shelters, and slashing the time that any family or individual spends in a shelter by swiftly moving thousands into apartments — often with long-term, taxpayer-funded subsidies.
These fundamental innovations culminated in the late 19th century in the development of the battleship, a heavily armoured, swiftly moving vessel equipped with huge, powerful, and extremely accurate long-range guns.
But a channel of swiftly moving water separated them from the nearest doorstep and Correa's arms were so cold that it took all of his effort to swim.
Rossi told the Guardian the operation was "like a lightning raid", with a sudden police presence swiftly moving protesters out of their base at Justin Herman plaza.
