Broaden out, also known as broaden, is a term used when referring to expanding or extending something. It is a verb that can be synonymous with several other words such as "expand," "widen," "stretch," "dilate," "increase" and "spread." When looking to convey the meaning of broadening out in a written piece or speech, these synonyms can be used to add variety and make the text more engaging. For instance, you can say that the company is looking to expand its customer base, or the road needs to be widened to accommodate more traffic. By using different synonyms for broaden out, you can avoid repetition and make your writing or speaking more effective.