When it comes to the word "research centers," there are various synonyms that can be used to describe similar establishments. One commonly used term is "research institutes," which typically refers to organizations that focus on conducting research in a specific field or area of study. "Research facilities" is another option, which can suggest a physical location or laboratory where research takes place. "Think tanks" is a term often used to describe research centers that engage in policy analysis and development. "Academic research centers" can refer to institutes affiliated with universities or other academic institutions. Lastly, "research organizations" can encompass different types of research establishments, including non-profit, government-funded, or private research entities.