The phrase "a powerful competitor" is correct and usable in written English.
You can use it when describing someone or something that is strong and effective in a competitive context, such as business or sports.
Example: "The new startup has emerged as a powerful competitor in the tech industry, challenging established companies with its innovative products."
Alternatives: "a formidable rival" or "a strong contender."
GasNatural had hoped its merger proposal would persuade Iberdrola's board with the argument that the combination of GasNatural's gas distribution network and Iberdrola's power-generation capabilities would create a powerful competitor in Europe.
But Google is going to be a powerful competitor".
And China joined the World Trade Organisation, marking the arrival of a powerful competitor to Mexico for footloose manufacturers hoping to export to the United States.
Indeed, while some participants here were defensive about Goldman, there was also a sense that some relished what the case might do to a powerful competitor.
And Warner, a powerful competitor, by then had successfully doubled down on violent genre films that, one after another, appeared to cross new thresholds.
In laying the basis for the enormous task of sequencing the human genome, Dr. Watson's consortium eventually brought into being a powerful competitor, the Celera Corporation.
Wadzeks Kampf mit der Dampfturbine (Wadzek's Battle with the Steam Turbine) tells the story of Wadzek, a factory owner locked in a losing battle with a more powerful competitor.
(Lyft, for various reasons, seems to be less of a target of driver resentment, and is also a less powerful competitor).
The launch is Canada-specific for now, but UnionPay has a very large addressable audience, and its mobile payments offering could be a quietly powerful competitor to the likes of Apple Pay.
Both capabilities will make Twitter a more powerful competitor to the likes of Google and Facebook.Other acquisitions Twitter has inked this year, including Trendrr, a social-media analytics company, and Bluefin Labs, will also strengthen its hand.
G.M. was also wary of Fiat, after an unhappy alliance during the first part of the decade, and was concerned that the acquisition of Opel would make Fiat a more powerful competitor.
