The phrase "as one voluminous" is not correct and does not convey a clear meaning in written English.
It may be intended to describe something that is large or extensive, but the phrasing is awkward and unclear.
Example: "The report was as one voluminous document, filled with data and analysis."
Alternatives: "as a single extensive" or "as one large".
One voluminous collection of academic writings that I consulted over the Christmas break listed thirteen interpretations of Fascism.
As one man searching so voluminous a file, Mr. Eddy said, he did not ask to view every document, but instead requested information selectively.
Ever since a few of our favorite natural hair bloggers listed this hair product as one of the styling secrets behind their voluminous twist-outs, we've been searching for it only to find out that it no longer exists.
In an 1883 letter to his daughter — part of the voluminous correspondence that established him as one of the century's great letter writers — he remarked that he would have become a Turgenev or a Zola had he not been far more interested in individuals than in society as a whole.
Below, her dress was as voluminous as an inflated parachute, dragging as she hobbled along the path.
In this voluminous biography, which was selected by the editors of the Book Review as one of the best books of 1999, the enigmatic J. Pierpont Morgan is portrayed as an inarticulate man with little interest in introspection but whose imperious, ruthless, indefatigable personality enabled him to forge the financial superstructure of the leading American industries in the Gilded Age.
Another is to construe the writer's voluminous output as an act of denial, a continuing attempt to stave off the realization that, as one of his characters puts it, "the world was a cheap and shoddy sham, a bad cover for something deeper and weirder and infinitely more strange".
