When you want to learn about a new topic or subject, you may hear people say "study up on" it. This phrase means to gather information and knowledge about something by reading, researching, or practicing. If you want to expand your vocabulary and use different expressions, here are some synonyms you can use instead of "study up on." You can "research," "delve into," "explore," "scrutinize," "investigate," "examine," "analyze," "peruse," "read up on," or "gain knowledge" about a topic. So, the next time you want to expand your knowledge, choose your vocabulary wisely and experiment with different expressions.