The phrase "a powerful pillar" is correct and usable in written English.
It can be used metaphorically to describe something that provides strong support or foundation, whether in a physical, emotional, or conceptual context.
Example: "Education serves as a powerful pillar in the development of a well-rounded individual."
Alternatives: "a strong foundation" or "a key support".
A bubble-jet effect is a powerful water pillar created when a torpedo or sea mine blows under a ship without striking it.
"They have been powerful pillars of support when I have needed them most over the past year.
Flames rose into the air, like powerful pillars, moving from side to side each time he brought his hands together.
While he failed to broaden his appeal and build any kind of national consensus, he also faced an active campaign by those hostile to his leadership, including some of the wealthiest and most powerful pillars of the Mubarak era.
With vivid and moving real-life stories, the book shows how leaders can use these powerful pillars to create and sustain happiness even when they're under pressure.
Named after the father and son team who created the tiled ceilings in the bridge's vaults (as well as the ceilings in the Grand Central Oyster Bar and the abandoned City Hall subway station), the restaurant encourages the eye to linger on the powerful pillars that lead upward to cathedral-like ceilings.
"Staffa," which he made around 1850, is a powerful image of natural pillars of volcanic rock on an island west of Scotland that are topped by jagged edges of a cliff face.
Manufacturing has long been viewed as an essential pillar of a powerful economy.
"My strategy professor in business school gave us a powerful insight that became a pillar of my efficacy as a leader," said Fission Strategy CEO Cheryl Contee.
The group said its target was a base of the Revolutionary Guards, a powerful military force that is a pillar of Iran's system of Islamic rule.
