When expressing concern over a situation or circumstance, it's often beneficial to have a range of synonyms at your disposal that offer a slightly different perspective. If you're looking to swap out "was concerned about" from your vocabulary, some possibilities include worried about, troubled by, anxious over, bothered by, preoccupied with, and uneasy about. Each option conveys a unique shade of meaning that can help to precisely communicate your emotional response to the issue at hand. By incorporating these synonyms into your writing or speech, you can create a more vivid and nuanced expression of your concern, enhancing your ability to connect with your audience and convey your message effectively.