The word "continued" essentially means to persist or carry on with an activity or event. Several synonyms can be used in place of "continued" to add variety to the writing. Some synonyms that can be used include: ongoing, uninterrupted, sustained, prolonged, maintained, and persisting. "Ongoing" is a great synonym for a long-term activity that is still in progress. "Uninterrupted" is ideal for an activity that has been going on without any breaks. "Sustained" is a synonym that can indicate a steady or prolonged period of time. "Prolonged" suggests something that has gone on for a longer time than anticipated. "Maintained" implies a consistent or steady effort to continue something. "Persisting" is a more formal synonym that means to continue with determination.