Broadly speaking, when we talk about synonyms for the phrase "broadly/generally speaking," we can consider a wide range of expressions that can be used as suitable replacements. Some of the commonly used synonyms that convey a similar meaning are generally, in general, overall, mainly, typically, usually, in the main, for the most part, to a large extent, and broadly. These words are used to provide a general overview or summary of a topic without going into too much detail. They can be helpful when we want to make a generalization or provide an overall perspective on a topic. Employing a well-chosen synonym can help in conveying the intended message more effectively and can make one's writing more engaging and interesting to read.