The word "brushup" is often used to refer to a quick review or revision of something, especially before an exam or an important meeting. Some common synonyms for "brushup" include revision, review, refresher, recap, overview, rundown, summary, and overview. These words all convey the idea of going over something again in an efficient and focused way, in order to refresh or update one's knowledge. Other related phrases might include "catching up", "revisiting", "touching base", or "going over". Whatever term you prefer to use, the important thing is that a brushup can be a great way to ensure that you are fully prepared and confident for whatever lies ahead.