The phrase "concern with" is frequently used in writing to convey a sense of worry or preoccupation with a particular topic or issue. However, there are several synonymous phrases that can be utilized to add variety and depth to one's writing. Some alternatives to "concern with" include "occupied with," "preoccupied with," "engaged with," "focused on," "wrapped up in," and "immersed in." Each of these phrases conveys a similar level of attention and care towards a particular subject, but with a slightly different connotation. Experimenting with different synonyms for "concern with" can help writers craft more engaging and dynamic prose.