It may be even an unusual or specific word. Let's look at what we've got to do to practice it. The big step here is to simply read faster. It sounds like such a simple statement, it almost sounds stupid. But it's what you have to do.
Comprehension comes later.
Practice reading without a great concern for comprehension. In clinical terms, we call this the comprehension lag. It takes the mind as many as ten to fifteen days to adapt to the new reading rate. You are going to go through periods, practice periods, you can't use on school books, but it's a practice period where you are simply adapting to reading that much faster. Comprehension lags for a while but when it catches up it makes a stunning difference.