"form a compact" is correct and usable in written English.
You can use it to refer to a formal agreement between two or more parties. For example, "The representatives of the two countries met to form a compact outlining the terms of the agreement."
Both Baarles form a compact whole.
From far away, though, the grass blades tightly cohere to form a compact image.
Eventually these cells fill the blastocoel and form a compact mass of endoderm.
In both types, the microscopic crystals are tightly interlocked to form a compact aggregate.
Ahmed Qurie, the new prime minister, retreated from his call to form a compact "emergency government," despite the Israeli threat of an invasion of Gaza.
With that in mind, enabling women to form a compact of protection for their daughters and granddaughters is a powerful way forward.
Also, Mr. Gore's proposal that the two men form a compact of mutual support once a winner is determined represents a sound step toward an orderly transition.
Ahmed Qurei, the new Palestinian prime minister, said on Wednesday that he would form a compact "emergency government" of six ministers and present it to parliament today.
"Operas in general," the critic Marcel Prawy wrote, "can only be properly enjoyed when audience, orchestra and stage form a compact community".
For a full-scale Class 3 casino, with slots, roulette, craps and poker, a tribe must form a compact with the home state of the casino, something Governor Pataki has said he will not offer the Oklahoma Seneca-Cayugas.
Given a chance, they'll form a compact mass on the sides and base of the processor, so you'll need to keep stopping the machine and scraping the contents back into play.
