The phrase "a swiftly growing" is correct and usable in written English.
It can be used to describe something that is increasing or expanding rapidly, often in contexts related to business, technology, or population growth.
Example: "The company is experiencing a swiftly growing demand for its innovative products."
Alternatives: "a rapidly increasing" or "a fast-expanding".
It is a swiftly growing category.
In three years, he and Mr. White have a swiftly growing restaurant empire rivaling those of the celebrity chefs Mario Batali and Daniel Boulud.
It was also about Atlanta's transformation, he said, from a small Southern city to a swiftly growing all-night destination for young people of all backgrounds.
The city, with a population nearing four million, has lost its white majority and will soon have a Latino majority, with a swiftly growing number of Asian-Americans.
Welcome to delivery UK, a swiftly growing £4.5bn industry that needs a huge and rapid increase in warehouse space, delivery vans, drivers and packers.
The legality of autonomous weapon systems (AWS) under international law is a swiftly growing issue of importance as technology advances and machines acquire the capacity to operate without human control.
Half a century of swiftly growing exports, accompanied by an expansion into international services like finance, has transformed all three economies' urban areas into some of the world's most modern cities.
New York City consumer officials charged yesterday that the swiftly growing Rent-a-Center chain, which rents household furnishings with the option to buy them, severely gouged customers who bought televisions and electronic goods.
In 2012 these accounted for about 4% of all TV advertising, and are becoming essential for firms that wish to snag a slice of the swiftly growing online gambling market.
But it's part of a vast global industry–one that, with swiftly growing appetites in countries such as China, India and Brazil, is expanding at a remarkable pace.
Until recently, the Obama campaign even talked of turning Georgia, with its swiftly growing black and Hispanic populations (and a booming Atlanta economy that has attracted its share of eggheads) blue in 2012.Mr Obama's popularity has fallen in the Southern battlegrounds, but less quickly than it has in many Midwestern states.
