Want to add flavor to a sentence? Add an adjective or two, like Paul does in Gal. 1:6-7.
Notice how he uses two different Greek words for "other."
It's a marvelous word play. But you don't see it in the KJV's "to another gospel which is not another." Much better is the ESV's "to a different gospel -- not that there is another one." Here's my own rendering: "I am completely flabbergasted that you are so quickly deserting the one who called you in the grace of Christ for another gospel, which is not a gospel of the same kind at all, but a gospel of a completely different kind!" This "other" gospel is not a second gospel. In fact, it is not a gospel at all.
Gotta love them adjectives!