"powerful organization" is a correct and usable phrase in written English.
You can use it when referring to a company, institution, or other entity that is powerful, influential, and effective. For example, "The Global Development Group is a powerful organization that has helped the community in many ways."
This recall drive is building a powerful organization.
The English mandate has allowed Mikitani to create a remarkably diverse and powerful organization.
(Two of them once led the Youth League, a powerful organization that is often a springboard to national leadership).
"Imagine — I am the son of a poor laborer and I am involved in this powerful organization," he said.
Almost immediately, he ran afoul of the powerful organization of country club general managers, the Metropolitan Club Managers Association.
With access to his own broadcasting channel, Dave Carroll became an insurgent — quickly outmaneuvering a much more powerful organization.
She prevailed despite vigorous opposition from the United Federation of Teachers, probably the most powerful organization in local Democratic politics.
— Damon Darlin Insider Calls Anonymous 'the Most Powerful Organization on Earth Nationalpost.com | Anonymous hacker claims the group has "access to every classified database in the U.S. government".
The abrupt resignation of Dominique Strauss-Kahn late Wednesday night has brought tensions long simmering beneath the surface at the powerful organization to a boil.
Appearing first on Taiwan, the Triads expanded with transport workers into southern China and became a powerful organization that dominated the Chinese underworld.
But every time Sepp Blatter makes a foolish comment, he draws attention to this powerful organization that quite clearly could use even more scrutiny.
