Governor and commander are interchangeable terms with Phil, expressive of the same respect and deference, and applicable to nobody but Mr. George.
"Dickens As an Educator"
James L. (James Laughlin) Hughes
They constituted the bulk of all the paper seen in circulation; they were supposed to be equivalent to money, but being bills of exchange they were merely negotiable instruments; they did not have the properties of bank-notes, which are constantly and directly interchangeable with money.
"Thomas Hart Benton"
Theodore Roosevelt
Owing to a habit of thought, due in the main to Plato, it was long customary to regard degrees of truth and goodness as interchangeable, and as equivalent to degrees of reality.
"The Approach to Philosophy"
Ralph Barton Perry