When it comes to finding synonyms for the phrase "is concerned with," there are several options available. For instance, you might use "deals with," "focuses on," or "relates to" to convey a similar idea. Other possibilities include "pertains to," "centers around," and "has to do with." These phrases can all be useful when you're trying to describe something that you are interested in or studying. Whether you're writing an academic paper, a business report, or a personal essay, using synonyms for "is concerned with" can help you to avoid repetition and create a more sophisticated and nuanced piece of writing.