Addition: Moreover, Furthermore, In Addition, Besides

Moreover, furthermore, in addition, and besides are formal addition connectors used to add extra information or a new supporting point. They go beyond simple "also" and "too" by signalling that the writer is building an argument or adding weight to a position. "The hotel was expensive. Moreover, the rooms were small" adds a second complaint to strengthen the first. These connectors typically start a new sentence or follow a semicolon.

Moreover and furthermore are the most formal and are common in academic essays, reports, and professional writing. They signal that an additional, often stronger point follows. In addition is slightly less formal but still appropriate for essays: "In addition, the study found a link between exercise and sleep quality." Besides is the least formal of the group and often introduces a different type of argument: "I don't want to go out tonight. Besides, I have an exam tomorrow." Using these connectors correctly shows strong vocabulary range and is highly valued in Cambridge B2 First and IELTS Writing Task 2.