The phrase "a buttress for" is correct and usable in written English.
It can be used to describe something that provides support or reinforcement for an idea, argument, or structure.
Example: "The research serves as a buttress for the theory that climate change is accelerating."
Alternatives: "a support for" or "a foundation for".
Until recently, manufacturing had been a buttress for the nation's economy, helping it resist headwinds from Europe's snowballing debt crisis.
WASHINGTON — Mitt Romney is seen by more voters in three battleground states as a strong leader after his dominant debate performance last week, but perceptions that the economy is improving remain a buttress for President Obama as the 2012 campaign comes down to its final weeks.
We describe an alternative method which used the fibula remnant (anlage) as a buttress for lateral stabilization of the ankle.
In his speech, he described science and research as a "buttress for economic growth" (Ng, 2010, p. 1).
The team that trots out at Lord's is likely to be more callow yet, a collection of players looking for Test security and a standard to rally around rather than a buttress for the man at the top of the pile.
Furthermore, the local community believes the ESA is as a buttress for local recovery efforts.
The Saturday night stay requirement has been a buttress of the airline fare structure for over 20 years.
The central core is left unexcavated until sides and crown are safely supported, thus providing a convenient central buttress for bracing the temporary support in each individual drift.
His administration provided a strong democratic buttress for the government of the Weimar Republic, and, during the late 1920s and early 1930s, a last outpost for the beleaguered German Social Democrats.
And these shootings in New York City, each offering dark buttress for the mayor's argument, occurred in a 72-hour time frame.
The anterior cortical contact after head neck sliding can also provide rigid buttress for secondary stability [ 23, 24].
